Gurgaon, Haryana May 13th 2011- Stellar Information Systems Ltd, pioneers in the field of data recovery solutions and services, today releases the upgraded version of its Oracle Recovery software. The new enhanced version Stellar Phoenix Oracle Recovery v3.0 is an ideal utility to perform a precise recovery of all schema objects in your Oracle database. In addition to recovering simple tables, views, indexes, clusters etc., the software efficiently restores different Index Organized Tables (IOT), Nested tables, Nested Object types, and Nested Array types etc.
Showing posts with label oracle database recovery. Show all posts
Showing posts with label oracle database recovery. Show all posts
Wednesday, May 18, 2011
Wednesday, March 23, 2011
The advanced Oracle recovery utility to retrieve your inaccessible Oracle database files safely
After opening an instance of Oracle, the application needs a database to be allocated to it. This allocation of database is known as ‘mounting’ and only after a successful mounting you can work on the database. But, sometimes, either due to the corruption of the database or any other application contradiction, you failed to mount the database. This results in the inaccessibility of your valuable data in the Oracle database and you need to look for any Oracle recovery utility to retrieve the data back.
During your day to day work, you tried to mount the Oracle database as the database administrator, but the database couldn't be initiated leaving all the data residing in it completely inaccessible.
Causes:
Among many possible reasons behind the above problem, below listed are some of the most probable ones:
There can be virus/malware infection, file system corruption, operating system malfunction or any other application contradiction, which may have resulted in the corruption of the Oracle database file.
Resolution:
In order to resolve the problem and access your data in the troubled Oracle database, follow the below written corrective measures:
If you failed to resolve the problem and still unable to access the database, you can restore the database files from the previously taken valid stable backup. But, if you do not have a valid backup of your database, still you can use any Oracle database recovery software to retrieve the files back.
These powerful dbf recovery software can repair the corrupt Oracle database and can help you restore all its objects. These utilities are read-only in their operations and recover Oracle databases with their internal structure being intact.
Stellar Phoenix Oracle Database Recovery is a reliable Oracle recovery software to recover corrupted or damaged databases created through Oracle 9i, 10g and 11g. The software works on Windows 2003, XP and with highly interactive graphical user interface, the software can be comfortably used without much technical knowledge.
Resource: http://www.articleslash.net/Computers-and-Technology/Data-Recovery/602966__The-advanced-Oracle-recovery-utility-to-retrieve-your-inaccessible-Oracle-database-files-safely.html
During your day to day work, you tried to mount the Oracle database as the database administrator, but the database couldn't be initiated leaving all the data residing in it completely inaccessible.
Causes:
Among many possible reasons behind the above problem, below listed are some of the most probable ones:
- The user account, through which you ran the database instance may have not proper privileges to mount the database.
- You have given some wrong parameters to open the the specified file.
- The particular database file has been corrupted or damaged.
There can be virus/malware infection, file system corruption, operating system malfunction or any other application contradiction, which may have resulted in the corruption of the Oracle database file.
Resolution:
In order to resolve the problem and access your data in the troubled Oracle database, follow the below written corrective measures:
- Ensure that the account through which you are trying to mount the Oracle database, do not have the mounting rights. Either change the access rights of the account or try with any other account with proper access privilege.
- Ensure that the parameters used in the command to mount the database are correct. Also, check that the particular parameter file is at its default location.
If you failed to resolve the problem and still unable to access the database, you can restore the database files from the previously taken valid stable backup. But, if you do not have a valid backup of your database, still you can use any Oracle database recovery software to retrieve the files back.
These powerful dbf recovery software can repair the corrupt Oracle database and can help you restore all its objects. These utilities are read-only in their operations and recover Oracle databases with their internal structure being intact.
Stellar Phoenix Oracle Database Recovery is a reliable Oracle recovery software to recover corrupted or damaged databases created through Oracle 9i, 10g and 11g. The software works on Windows 2003, XP and with highly interactive graphical user interface, the software can be comfortably used without much technical knowledge.
Resource: http://www.articleslash.net/Computers-and-Technology/Data-Recovery/602966__The-advanced-Oracle-recovery-utility-to-retrieve-your-inaccessible-Oracle-database-files-safely.html
Wednesday, March 2, 2011
Advanced Oracle database recovery utility to deal with ORA-00376 error
The data in an Oracle database is stored at different levels, including the table space, segments, extents, blocks etc. Prior to access the database, all the database objects need to be mounted properly. But, if the database has been damaged or corrupted, then it fails to mount and all the data in the database becomes inaccessible. The reason can be anything, such as a virus attack, file system corruption, database header corruption etc. In any of these situations, in order to recover back the data from the tables, you have to repair Oracle database. There are many third-party Oracle database recovery utilities available for the same.
You may encounter the below error message while mounting any Oracle 9i database:
“ORA-00376: file xx cannot be read at this time”
Cause:
The most possible reason behind the error message can be the corruption of the ‘UNDO tablespace’. This is the reason that you failed to mount the database and you will continue receiving the same error message each time you try to mount the database.
Resolution:
Following steps can guide you repairing Oracle database:
- Change the parameter related to ‘undo_management’ from Auto to Manual.
- Create a new ‘UNDO tablespace’.
- Drop the previous ‘UNDO tablespace’.
- Try mounting the database.
Oracle database corruption usually acts at the lowest level that id the table space level and sometimes, when you drop the troubled table space, it creates some more problems. In such situation, you receive the below error message:
“ ORA-00376: file string cannot be read at this time”
Such situations of harsh database corruption issues can only be dealt with advanced dbf recovery utilities. These utilities are designed to repair and recover Oracle database under any instance of corruption. These software are extremely reliable in all their operations and do not change or modify the structure of the database. Moreover, with highly interactive graphical user interfaces, you need have to worry a little regarding the functionalities of these software.
Stellar Phoenix Oracle Database Recovery is a powerful as yet reliable Oracle database recovery software, which can help you repair your database and recover all its objects safely. The software is absolutely risk-free and recovers the database with its internal structure being completely intact. The software works on the database files created with Oracle 9i, 10g, 11g and is compatible with Windows Server 2003, XP.
Wednesday, February 16, 2011
Safe Oracle Database Recovery Utility to Repair Oracle Database and Recover Your Data
Oracle is one of the mostly used relational database management system of the current time. The application is platform independent, fast and secure in its operations. These are the reasons, for which many organizations as well as individual users use Oracle to store and manage their important data. Sometimes, operating system crash, file system corruption, virus/malware attack or any other application malfunction leads to the corruption of Oracle database. These result in the complete inaccessibility of valuable data stored in the database and in order to get them back, you need any efficient Oracle database recovery utility.
Take a common instance of Oracle database corruption issue, where you made a cold backup of the database and archived the generated log file. But, when you tried to open the particular database, you failed to do so following an error message from the application. The error message, which you received, can be written as below:
"ORA-00353: log corruption near block change time "
Cause:
The most possible reason behind the occurrence of the error message is that the Oracle database has got corrupted.
Resolution:
It is a general convention for all the Oracle database users that whenever your redo log file gets corrupted or missing, just open the database with the ‘RESETLOGS’ option. This option can create the log file once again and the database can be restored. Following steps may guide you through the process:
Set the closing parameter of the database with the option, ‘SHUTDOWN NORMAL’.
Set the parameters, ‘STARTUP MOUNT’ and ‘ALTER DATABASE OPEN RESETLOGS’.
In case the database asks for its recovery, choose the option, ‘UNTIL CANCEL’. Apply the same to all archive and redo logs.
Issue the ‘CANCEL’ and ‘ALTER DATABASE OPEN RESETLOGS’ commands.
Wait a while for Oracle to accomplish the job. Then, issue ‘SHUTDOWN NORMAL’.
Remove the above set parameters and issue ‘STARTUP’.
Check the file, ‘ALERT.LOG’ again for errors.
Try to extract the data and rebuild the database.
If the above steps fail to resolve the problem, then, just look into your backup server for a valid copy of the database. However, if you do not have any valid backup, you are left with a single choice to run a dbf recovery software to recover Oracle database.
Stellar Phoenix Oracle Recovery software is an innovative utility to repair Oracle database under any instance of corruption and recovers the tables, schema, roles, forms etc with their integrity being intact. This Oracle database recovery software is absolutely risk-free I all its repair and recovery operations.
http://www.articleslash.net/Computers-and-Technology/Data-Recovery/600001__Safe-Oracle-Database-Recovery-Utility-to-Repair-Oracle-Database-and-Recover-Your-Data.html
Take a common instance of Oracle database corruption issue, where you made a cold backup of the database and archived the generated log file. But, when you tried to open the particular database, you failed to do so following an error message from the application. The error message, which you received, can be written as below:
"ORA-00353: log corruption near block change time "
Cause:
The most possible reason behind the occurrence of the error message is that the Oracle database has got corrupted.
Resolution:
It is a general convention for all the Oracle database users that whenever your redo log file gets corrupted or missing, just open the database with the ‘RESETLOGS’ option. This option can create the log file once again and the database can be restored. Following steps may guide you through the process:
Set the closing parameter of the database with the option, ‘SHUTDOWN NORMAL’.
Set the parameters, ‘STARTUP MOUNT’ and ‘ALTER DATABASE OPEN RESETLOGS’.
In case the database asks for its recovery, choose the option, ‘UNTIL CANCEL’. Apply the same to all archive and redo logs.
Issue the ‘CANCEL’ and ‘ALTER DATABASE OPEN RESETLOGS’ commands.
Wait a while for Oracle to accomplish the job. Then, issue ‘SHUTDOWN NORMAL’.
Remove the above set parameters and issue ‘STARTUP’.
Check the file, ‘ALERT.LOG’ again for errors.
Try to extract the data and rebuild the database.
If the above steps fail to resolve the problem, then, just look into your backup server for a valid copy of the database. However, if you do not have any valid backup, you are left with a single choice to run a dbf recovery software to recover Oracle database.
Stellar Phoenix Oracle Recovery software is an innovative utility to repair Oracle database under any instance of corruption and recovers the tables, schema, roles, forms etc with their integrity being intact. This Oracle database recovery software is absolutely risk-free I all its repair and recovery operations.
http://www.articleslash.net/Computers-and-Technology/Data-Recovery/600001__Safe-Oracle-Database-Recovery-Utility-to-Repair-Oracle-Database-and-Recover-Your-Data.html
Sunday, February 6, 2011
Recover Oracle Database Successfully by Oracle Recovery Tool
Oracle database is a relational database, which is developed and designed by the Oracle corporation. Many reputed government and private companies use oracle database for managing and organizing their valuable data. The database administrator use DML command for manipulating the oracle database and other users access the database records by their need. Because of this regular updation in the oracle database sometimes oracle database gets corrupted and data stored in the database are inaccessible. To recover from this situation you should use an advanced oracle recovery tool to fix the issue.
This regular updation is not only the factor that damaged or corrupt oracle database. There are so many other internal and external agents that damaged oracle database like application problem, malfunction of database, virus attack, incompatible database version, connectivity problem, hardware issue, power failure and many more. These all make oracle database inaccessible and useless.
When an oracle database gets damaged or corrupted reflects some error message. Some of the error messages is given below:
ORA-01053: user storage address cannot be read
ORA-01079: Oracle database was not properly created, operation aborted
ORA-01043: user side memory corruption
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ORA-01073: fatal connection error: unrecognized call type
ORA-01099: cannot mount database in SHARED mode if started in single process mode
ORA-00376: file xx cannot be read at this time
So for the smooth functioning of your oracle database, you should use an advanced oracle database recovery software to fix the problem. There are so many third party recovery software for oracle are available in the market to repair oracle database. These advanced oracle recovery software throwly scan the corrupted oracle database and restore them at default location or user specified location.
Stellar Phoenix Oracle Database Recovery software is an advanced tool to repair Oracle database and restore its various objects. The software has been designed to recover the oracle database created through Oracle 11g, 10g, 9i and compatible with Windows 2003, Vista, XP and 7. The software has many interesting features, such as recovery of selective database objects, previews of all the recoverable objects prior to original recovery. Moreover, the interactiveness of this Oracle recovery software, which is an added plus for the users who does not have much technical knowledge to operate these kinds of recovery software.
Resource: http://www.americanchronicle.com/articles/view/212353
This regular updation is not only the factor that damaged or corrupt oracle database. There are so many other internal and external agents that damaged oracle database like application problem, malfunction of database, virus attack, incompatible database version, connectivity problem, hardware issue, power failure and many more. These all make oracle database inaccessible and useless.
When an oracle database gets damaged or corrupted reflects some error message. Some of the error messages is given below:
ORA-01053: user storage address cannot be read
ORA-01079: Oracle database was not properly created, operation aborted
ORA-01043: user side memory corruption
Whorush: 21 sites by this AdSense ID
ORA-01073: fatal connection error: unrecognized call type
ORA-01099: cannot mount database in SHARED mode if started in single process mode
ORA-00376: file xx cannot be read at this time
So for the smooth functioning of your oracle database, you should use an advanced oracle database recovery software to fix the problem. There are so many third party recovery software for oracle are available in the market to repair oracle database. These advanced oracle recovery software throwly scan the corrupted oracle database and restore them at default location or user specified location.
Stellar Phoenix Oracle Database Recovery software is an advanced tool to repair Oracle database and restore its various objects. The software has been designed to recover the oracle database created through Oracle 11g, 10g, 9i and compatible with Windows 2003, Vista, XP and 7. The software has many interesting features, such as recovery of selective database objects, previews of all the recoverable objects prior to original recovery. Moreover, the interactiveness of this Oracle recovery software, which is an added plus for the users who does not have much technical knowledge to operate these kinds of recovery software.
Resource: http://www.americanchronicle.com/articles/view/212353
Monday, January 24, 2011
Hidden Parameters to Access Corrupt Oracle Databases
Is your Oracle database inaccessible due to corruption? Are you unable to open a corrupt database and extract information from it? You may face critical situations, if you are an Oracle data base administrator. Being a database administrator, it is a big responsibility on you to keep your database up to date and running. Database corruption leads to severe data loss and affects working of entire organization. In such critical situations, you must restore the data from current backup to fix the issue. But if backup is not available, Oracle database recovery becomes need of hour.
You must keep in mind that in case of emergency, you can open your corrupt database and access some data from it. It is possible using some special hidden parameters. This database corruption generally occurs due to database block corruption. Such hidden parameters enable you to easily ignore the damaged data blocks if the database is severely damaged. Some of the hidden parameters of the database are as given below:
_allow_resetlogs_corruption- This parameters is the only method to initialize 'db backed-up open without setting backup' on the tablespace. It makes your system unsupported.
_corrupted_rollback_segments- It is the only method to start up your database with damaged public rollback segments. You can use this undocumented parameter without concerning about invalidating support.
_allow_read_only_corruption- It enables the database to be accessed even if it is corrupt. You should use this option only while exporting as much information from your damaged Oracle database as possible before you re-create the database. You must not use the database in normal manner, which is opened in this manner.
_corrupt_blocks_on_stuck_recovery - You can use this database to start your damaged database. But, it is possibly not supported if you do it without blessing of Oracle. You should immediately expert database tables in such cases and rebuild it.
You should use the above hidden parameters to recover database only in case of emergency. The must be used by taking help from technical support of Oracle as improper use of these hidden parameters can cause further data loss.
In such cases, You need to repair Oracle database using third-party applications. They use most efficient scanning methods to ensure absolute recovery. Such database repair software are completely safe and easy to use.
Stellar Phoenix Oracle Recovery software repairs and restores damaged objects of Oracle database. The dbf recovery software supports recovery of tables, table spaces, views, schemas, roles, cluster tables, sequences, roles, indexes, and all other Oracle database objects. It salvages all the databases, created using Oracle 9i.
Source
You must keep in mind that in case of emergency, you can open your corrupt database and access some data from it. It is possible using some special hidden parameters. This database corruption generally occurs due to database block corruption. Such hidden parameters enable you to easily ignore the damaged data blocks if the database is severely damaged. Some of the hidden parameters of the database are as given below:
_allow_resetlogs_corruption- This parameters is the only method to initialize 'db backed-up open without setting backup' on the tablespace. It makes your system unsupported.
_corrupted_rollback_segments- It is the only method to start up your database with damaged public rollback segments. You can use this undocumented parameter without concerning about invalidating support.
_allow_read_only_corruption- It enables the database to be accessed even if it is corrupt. You should use this option only while exporting as much information from your damaged Oracle database as possible before you re-create the database. You must not use the database in normal manner, which is opened in this manner.
_corrupt_blocks_on_stuck_recovery - You can use this database to start your damaged database. But, it is possibly not supported if you do it without blessing of Oracle. You should immediately expert database tables in such cases and rebuild it.
You should use the above hidden parameters to recover database only in case of emergency. The must be used by taking help from technical support of Oracle as improper use of these hidden parameters can cause further data loss.
In such cases, You need to repair Oracle database using third-party applications. They use most efficient scanning methods to ensure absolute recovery. Such database repair software are completely safe and easy to use.
Stellar Phoenix Oracle Recovery software repairs and restores damaged objects of Oracle database. The dbf recovery software supports recovery of tables, table spaces, views, schemas, roles, cluster tables, sequences, roles, indexes, and all other Oracle database objects. It salvages all the databases, created using Oracle 9i.
Source
Thursday, December 30, 2010
With Advanced dbf recovery solution, recover Oracle database safely
The Oracle database, which is referred as Oracle RDBMS in technical circle and is popularly known as only 'Oracle' among most of the users. Oracle is one of the mostly used database applications in the world by financial organizations, software firms, business entrepreneurs and individuals. This vast database application facilitates many advanced features to deal with huge volume of data along with many advanced measures for preserving the data security and integrity. However, sometimes the Oracle database carrying all your business critical information becomes inaccessible and in such situations of database crisis, an Oracle database recovery utility can help you recover the corrupted or damaged Oracle.
In general, when you start an instance of Oracle application, it links to an Oracle database, which is known as the mounting database. With mounting, you can be able to perform the Select, Create, Modify and Delete operations on the mounted oracle. However, because of an unexpected system shut-down, file header corruption, virus infection etc, sometimes, the Oracle database fails to mount and the data in the database becomes completely inaccessible. Some of the common causes of database corruption or loss are listed as below:
Corruption to the Media Block
Malfunctioning of the operating system
Damage to the application server
Corruption to the file system of the database server system
If implemented with a RAID system, corruption/failure of the same
Formatting and Re-installation of operating system etc.
Under all the above cases of database loss or corruption, the database and the corresponding data is not permanently lost until they are being overwritten by some other data. Hence, with the help of any advanced utility to recover Oracle can be the key to repair and restore the seemingly lost data.
These dbf recovery utilities are designed with innovative methodologies to repair Oracle, even with harsh corruption and help you restore the tables, containers, triggers, schema, index, roles etc with their original format being intact. Moreover, these applications recover dbf without even modifying the structure of the original database and are absolutely risk-free in all their operations.
Stellar Phoenix Oracle Recovery is an advanced utility to repair Oracle database and restore various objects. The software has been designed to recover the databases created through Oracle 11g, 10g, 9i and is completely compatible with Windows Server 2003 and XP. The software incorporates many interesting features, such as recovery of selective database objects, previews of all the recoverable objects prior to original recovery etc. Moreover, the interactiveness of this Oracle database recovery application, which is an added plus for the users who does not have much technical knowledge to operate these kinds of recovery software.
Article Source: http://www.articlesbase.com/data-recovery-articles/with-advanced-dbf-recovery-solution-recover-oracle-database-safely-3871066.html
About the Author
My name is Mark Willium, I have done Ph.D in computer science and currently doing research on how to recover oracle database.
In general, when you start an instance of Oracle application, it links to an Oracle database, which is known as the mounting database. With mounting, you can be able to perform the Select, Create, Modify and Delete operations on the mounted oracle. However, because of an unexpected system shut-down, file header corruption, virus infection etc, sometimes, the Oracle database fails to mount and the data in the database becomes completely inaccessible. Some of the common causes of database corruption or loss are listed as below:
Corruption to the Media Block
Malfunctioning of the operating system
Damage to the application server
Corruption to the file system of the database server system
If implemented with a RAID system, corruption/failure of the same
Formatting and Re-installation of operating system etc.
Under all the above cases of database loss or corruption, the database and the corresponding data is not permanently lost until they are being overwritten by some other data. Hence, with the help of any advanced utility to recover Oracle can be the key to repair and restore the seemingly lost data.
These dbf recovery utilities are designed with innovative methodologies to repair Oracle, even with harsh corruption and help you restore the tables, containers, triggers, schema, index, roles etc with their original format being intact. Moreover, these applications recover dbf without even modifying the structure of the original database and are absolutely risk-free in all their operations.
Stellar Phoenix Oracle Recovery is an advanced utility to repair Oracle database and restore various objects. The software has been designed to recover the databases created through Oracle 11g, 10g, 9i and is completely compatible with Windows Server 2003 and XP. The software incorporates many interesting features, such as recovery of selective database objects, previews of all the recoverable objects prior to original recovery etc. Moreover, the interactiveness of this Oracle database recovery application, which is an added plus for the users who does not have much technical knowledge to operate these kinds of recovery software.
Article Source: http://www.articlesbase.com/data-recovery-articles/with-advanced-dbf-recovery-solution-recover-oracle-database-safely-3871066.html
About the Author
My name is Mark Willium, I have done Ph.D in computer science and currently doing research on how to recover oracle database.
Monday, December 27, 2010
Oracle Cannot Read Database Files Due to Corruption
The Oracle DBMS (Database Management System) stores data in a hierarchical format in all of its database components. Data is stored at four levels- Blocks, Extents, Tablespaces, and Segments. If any of these components is damaged, database becomes un-mountable and the database records become inconsistent. This behavior of Oracle database makes your valuable data inaccessible and causes serious data loss. In order to handle such situations, Oracle database recovery software are required.
Most commonly the Oracle database corruption starts at Tablespace level, which is the most initial level of the database. The reasons of database corruption could be anything from virus infection, improper system shutdown, application crash to operating system damage. You may encounter various error messages in such cases, while accessing the database. Such errors may be similar to the following one-
"ORA-00376: file xx cannot be read at this time"
You may encounter the above error every time you try to mount the Oracle database. A corrupt database cannot be mounted and thus it cannot be accessed. To recover Oracle database in such cases, you are required to identify the cause of this problem and then fix it using Oracle recovery solutions.
Cause
The most probable reason of this behavior of Oracle database (DBF file) is damage to the UNDO Tablespace. Corruption makes whole database unusable and inaccessible.
Resolution
Go through the below DBF recovery steps to work around the corruption problem-
Modify the value of the undo_management parameter as ‘MANUAL'. By default it is set to AUTO.
Drop the damaged Tablespace and create a new UNDO Tablespace.
In majority of situations, above steps fix the problem and repair Oracle database. But in case the above
solution fails, database becomes un-mountable. In such cases, try the following solutions-
Restore database from the most recent backup. However, you are recommended to restore the database only if you have a valid and updated backup. An incomplete backup may cause further data loss.
Use third-party Oracle recovery software to repair and restore the database. They perform Oracle database recovery in virtually every database corruption situation, regardless of the cause and extent of corruption.
Such DBF recovery applications are particularly designed to recover DBF files in an extremely safe and easy way with their read-only conduct and simple user interface. They recover Oracle database along with all of its components, such as tables, reports, forms, macros, data types, and more.
Stellar Phoenix Oracle Recovery is an effective Oracle database recovery solution to repair Oracle 9i database.
Article Source: http://www.articlesbase.com/data-recovery-articles/oracle-cannot-read-database-files-due-to-corruption-3921700.html
About the Author
My name is Mark Willium, I have done Ph.D in computer science and currently doing research on how to recover oracle database.
Most commonly the Oracle database corruption starts at Tablespace level, which is the most initial level of the database. The reasons of database corruption could be anything from virus infection, improper system shutdown, application crash to operating system damage. You may encounter various error messages in such cases, while accessing the database. Such errors may be similar to the following one-
"ORA-00376: file xx cannot be read at this time"
You may encounter the above error every time you try to mount the Oracle database. A corrupt database cannot be mounted and thus it cannot be accessed. To recover Oracle database in such cases, you are required to identify the cause of this problem and then fix it using Oracle recovery solutions.
Cause
The most probable reason of this behavior of Oracle database (DBF file) is damage to the UNDO Tablespace. Corruption makes whole database unusable and inaccessible.
Resolution
Go through the below DBF recovery steps to work around the corruption problem-
Modify the value of the undo_management parameter as ‘MANUAL'. By default it is set to AUTO.
Drop the damaged Tablespace and create a new UNDO Tablespace.
In majority of situations, above steps fix the problem and repair Oracle database. But in case the above
solution fails, database becomes un-mountable. In such cases, try the following solutions-
Restore database from the most recent backup. However, you are recommended to restore the database only if you have a valid and updated backup. An incomplete backup may cause further data loss.
Use third-party Oracle recovery software to repair and restore the database. They perform Oracle database recovery in virtually every database corruption situation, regardless of the cause and extent of corruption.
Such DBF recovery applications are particularly designed to recover DBF files in an extremely safe and easy way with their read-only conduct and simple user interface. They recover Oracle database along with all of its components, such as tables, reports, forms, macros, data types, and more.
Stellar Phoenix Oracle Recovery is an effective Oracle database recovery solution to repair Oracle 9i database.
Article Source: http://www.articlesbase.com/data-recovery-articles/oracle-cannot-read-database-files-due-to-corruption-3921700.html
About the Author
My name is Mark Willium, I have done Ph.D in computer science and currently doing research on how to recover oracle database.
Thursday, December 23, 2010
Recovering unmountable Oracle 9i database
The instance of an Oracle server is assembled using allocated memory (System Global Area) and running process (SMON, PMON, LGWR, DBWR). When you start the Server instance, it is allocated with the particular database, which is known as the mounting the Oracle database. This is the most primitive step of using the database and its related records. However, at times you are unable to access the Oracle instance. Such problems may occur due to corruption in Oracle database, which can happen because of various reasons such as media block corruption, damaged file system, damage in the Oracle 9i application server, etc. In such cases, you should try out each and every possible workaround to recover Oracle database including using latest database backup. If you are unable to fix the error, then you should use a third-party Oracle database recovery software to do the needful.
Consider a scenario wherein you are having Oracle 9i server on your Windows Server 2003 system. You try to mount the Oracle database using the following command:
oradim -new -sid %ORACLE_SID% -pfile c:xyz.ora
However, you are unable to mount the database instance. An erro message is displayed suggesting that the database cannot be mounted.
Cause:
There could be the following causes for the aforementioned problem:
You may not have the appropriate credentials to log into the database server and mount the database.
You are unable to open the parameter file.
The database has corrupted due to any of the reasons mentioned earlier in this article.
Resolution:
To resolve this problem, you need to repair Oracle database. To do this, you would have to ensure the following precautions:
You have the appropriate credentials to log into the database server.
The parameter file is at its mentioned location.
Try to find out if the backup of the database is clean and updated. If yes, then you should restore the database with its backup.
You should use the DBMS_REPAIR method to repair the block corruption in the Oracle database.
However, if you are still not able to mount the Oracle database then you should use a third-party DBF recovery software. Such read-only tools are able to recover DBF files without overwriting the existing database.
Stellar Phoenix Oracle Database Recovery is an Oracle database recovery software that repairs Oracle database created in Oracle 9i. It is capable of recovering various database components such as tables, views, cluster tables, schemas, sequences, etc. In addition, this oracle recovery software restores primary and foreign keys associated with the database tables. It is compatible with Windows Server 2003 and XP.
Resource: http://www.americanchronicle.com/articles/view/204324
Consider a scenario wherein you are having Oracle 9i server on your Windows Server 2003 system. You try to mount the Oracle database using the following command:
oradim -new -sid %ORACLE_SID% -pfile c:xyz.ora
However, you are unable to mount the database instance. An erro message is displayed suggesting that the database cannot be mounted.
Cause:
There could be the following causes for the aforementioned problem:
You may not have the appropriate credentials to log into the database server and mount the database.
You are unable to open the parameter file.
The database has corrupted due to any of the reasons mentioned earlier in this article.
Resolution:
To resolve this problem, you need to repair Oracle database. To do this, you would have to ensure the following precautions:
You have the appropriate credentials to log into the database server.
The parameter file is at its mentioned location.
Try to find out if the backup of the database is clean and updated. If yes, then you should restore the database with its backup.
You should use the DBMS_REPAIR method to repair the block corruption in the Oracle database.
However, if you are still not able to mount the Oracle database then you should use a third-party DBF recovery software. Such read-only tools are able to recover DBF files without overwriting the existing database.
Stellar Phoenix Oracle Database Recovery is an Oracle database recovery software that repairs Oracle database created in Oracle 9i. It is capable of recovering various database components such as tables, views, cluster tables, schemas, sequences, etc. In addition, this oracle recovery software restores primary and foreign keys associated with the database tables. It is compatible with Windows Server 2003 and XP.
Resource: http://www.americanchronicle.com/articles/view/204324
Thursday, December 9, 2010
Oracle Recovery when Oracle Display Error 00376
In Oracle database system, the data is saved in the form of a DBF (Database File) file. It is saved in a hierarchy at four distinct levels: tablespace, segments, extents, and blocks, in the ascending order. When database corruption occurs, it usually happens at the lowest level, that is the at the tablespaces. Due to database corruption, you are unable to mount the database thereby making it inaccessible, which is a very undesirable proposition. Such instances occur due to various reasons such as virus infections, database header corruption, file system corruption, media block corruption, etc. In such situations, you should try to repair Oracle database using appropriate corrective measures. However, if you are unable to perform DBF recovery then you should use a third-party Oracle recovery software to do the needful for you.
Consider a scenario wherein you try to mount an Oracle 9i database but fail to do so. An error message is displayed, that is:
"ORA-00376: file xx cannot be read at this time"
Cause:
The primary cause of this error message is that the UNDO tablespace has corrupted. Because of this, you are unable to mount the database. Also, you would get the same error message every time you try to mount the database.
Resolution:
To resolve this tricky situation, you should try to repair Oracle database. To do this, you can perform either of the following steps:
Change the undo_management parameter from 'Auto' to 'Manual'.
Create a new UNDO tablespace.
Drop the previous UNDO tablespace.
Now try to mount the database. It should run fine now.
However, sometimes dropping the damaged tablespace can be troublesome and it would generate the following error message:
" ORA-00376: file string cannot be read at this time"
In such situations, you should use a third-party Oracle database recovery software to recover the corrupted database. Such DBF recovery tools are able to recover DBF files without overwriting the existing database.
Stellar Phoenix Oracle Database Recovery is an Oracle database recovery software that is able to repair corrupted Oracle databases from all instances of logical corruption. It is specifically designed to recover Oracle database created in Oracle 9i. This Oracle database recovery utility restores several database components such as tables, cluster tables, schemas, views, sequences, etc. In addition, this DBF recovery tool is able to recover the user-defined data functions and packages & packages body as well. It is compatible with Windows Server 2003 and XP.This article is refereed from http://www.americanchronicle.com/articles/view/203418
Consider a scenario wherein you try to mount an Oracle 9i database but fail to do so. An error message is displayed, that is:
"ORA-00376: file xx cannot be read at this time"
Cause:
The primary cause of this error message is that the UNDO tablespace has corrupted. Because of this, you are unable to mount the database. Also, you would get the same error message every time you try to mount the database.
Resolution:
To resolve this tricky situation, you should try to repair Oracle database. To do this, you can perform either of the following steps:
Change the undo_management parameter from 'Auto' to 'Manual'.
Create a new UNDO tablespace.
Drop the previous UNDO tablespace.
Now try to mount the database. It should run fine now.
However, sometimes dropping the damaged tablespace can be troublesome and it would generate the following error message:
" ORA-00376: file string cannot be read at this time"
In such situations, you should use a third-party Oracle database recovery software to recover the corrupted database. Such DBF recovery tools are able to recover DBF files without overwriting the existing database.
Stellar Phoenix Oracle Database Recovery is an Oracle database recovery software that is able to repair corrupted Oracle databases from all instances of logical corruption. It is specifically designed to recover Oracle database created in Oracle 9i. This Oracle database recovery utility restores several database components such as tables, cluster tables, schemas, views, sequences, etc. In addition, this DBF recovery tool is able to recover the user-defined data functions and packages & packages body as well. It is compatible with Windows Server 2003 and XP.This article is refereed from http://www.americanchronicle.com/articles/view/203418
Saturday, November 20, 2010
Avoid Common Mistakes While Recovering Damaged Oracle Database
Database corruption is a quite common problem in every Relational Database Management System, including Oracle. The corruption makes your database inaccessible, because it cannot be recognized by Oracle application. In a number of database corruption situations, DBA (Database Administrator) can restore the database. However, in some cases, the database administrator may make some serious errors that can lead to further corruption. Such mistakes are generally caused by poor judgment and stress. In such situations, Oracle database recovery solutions come for your help.
Following are two general issues that you should avoid while handling a damaged Oracle database:
Backup Failed Oracle Database- The very first step that you must take in such cases, is to backup the corrupted Oracle database. Unfortunately, several Oracle versions don't test the recoveries, and if you discover the backups aren't recoverable, you might be happy to see that you have a complete backup of the corrupted Oracle database.
Rarely Force Bad Recovery- If you are unable to repair Oracle database (DBF) file, it cannot be opened. It is the way of Oracle application to prevent further damage due to manual repair of the database. You can use the below options to open a recovered database:
Use an earlier backup- This is quite useful to have an updated backup to easily cure database corruption.
Restore initially failed Oracle database- It might take less time to manually repair the database than forcing bad recovery.
Force to open database- You should use this option as a last resort only. It may cause massive damage to the Oracle database and permanent data loss.
You should always consult the experts and take best practices to ensure perfect recovery of damaged Oracle database. A minor mistake, while handling a damaged Oracle database may cause serious corruption and severe data loss.
In order to prevent such critical situations from being occurred with your Oracle database, you should maintain an absolute backup. The backup must be updated regularly and it should be checked for validity. If backup itself gets damaged, oracle database repair is the only way to go for.
Oracle database recovery is best possible using powerful and advanced third-party applications, which successfully recover Oracle database in all possible cases of database corruption. They deploy high-end scanning mechanisms for assured recovery of all database objects.
Stellar Oracle Recovery is the most excellent solution to effectively handle all your Oracle database corruption problems. It works well with Oracle 9. The oracle database recovery software is capable of restoring all the Oracle database objects, such as tables, reports, forms, macros, data types, constraints, and more.
http://www.sooperarticles.com/technology-articles/data-recovery-articles/avoid-common-mistakes-while-recovering-damaged-oracle-database-85814.html
Following are two general issues that you should avoid while handling a damaged Oracle database:
Backup Failed Oracle Database- The very first step that you must take in such cases, is to backup the corrupted Oracle database. Unfortunately, several Oracle versions don't test the recoveries, and if you discover the backups aren't recoverable, you might be happy to see that you have a complete backup of the corrupted Oracle database.
Rarely Force Bad Recovery- If you are unable to repair Oracle database (DBF) file, it cannot be opened. It is the way of Oracle application to prevent further damage due to manual repair of the database. You can use the below options to open a recovered database:
Use an earlier backup- This is quite useful to have an updated backup to easily cure database corruption.
Restore initially failed Oracle database- It might take less time to manually repair the database than forcing bad recovery.
Force to open database- You should use this option as a last resort only. It may cause massive damage to the Oracle database and permanent data loss.
You should always consult the experts and take best practices to ensure perfect recovery of damaged Oracle database. A minor mistake, while handling a damaged Oracle database may cause serious corruption and severe data loss.
In order to prevent such critical situations from being occurred with your Oracle database, you should maintain an absolute backup. The backup must be updated regularly and it should be checked for validity. If backup itself gets damaged, oracle database repair is the only way to go for.
Oracle database recovery is best possible using powerful and advanced third-party applications, which successfully recover Oracle database in all possible cases of database corruption. They deploy high-end scanning mechanisms for assured recovery of all database objects.
Stellar Oracle Recovery is the most excellent solution to effectively handle all your Oracle database corruption problems. It works well with Oracle 9. The oracle database recovery software is capable of restoring all the Oracle database objects, such as tables, reports, forms, macros, data types, constraints, and more.
http://www.sooperarticles.com/technology-articles/data-recovery-articles/avoid-common-mistakes-while-recovering-damaged-oracle-database-85814.html
Thursday, November 11, 2010
Oracle Database Recovery from its Backups
Recovery and backup are the most important aspects of database job. If anyone lose their company's data, he/she could very well lose his/her job. Software and hardware can always be replaced but data may not be replaceable. For smooth functioning of any organization/company good recovery and backup technique is required. You can schedule your backup policy on daily, weekly or monthly basis. Consider a situation, you are working on the company project and your database gets corrupted and backup is not managed, at that situation you should use an advanced database recovery software to recover database.
Backup frequency of any database normally depend upon the given below factors:
Oracle Database Backing-up strategies: Various strategies are available for backing-up of Oracle database.
Export/Import: Export is the logical database backup in which they extract logical definitions and data from the database to a file.
Off-line Backup: It is also known as cold backup. Shutdown the database and backup all the logs, control files and data.
On-line Backup: It is also known as hot backup. If the database is in ARCHIVELOG mode, set the tablespaces into backup mode and backup their files.
RMAN Backup: RMAN utility is used to backup database while database is in off-line or online mode.
Difference between online and offline backup: There are so many difference between online and offline backup. Some of them is given below:
Your Oracle database got damaged and none of above backups are available, you could use stellar oracle database recovery software to recover your database. This software is read only in nature. This Oracle recovery software completely repairs and restores all Oracle database objects, such as tables, table spaces, schemas, views, roles, constrains, indexes and sequences.
Backup frequency of any database normally depend upon the given below factors:
- Criticality of the data/ Value of the data to the organization. Rate of data change/ transaction rate. Read-only tablespace needs backup just once right after you make it read-only. If you are running in archivelog mode you can backup parts of a database over an extended cycle of periods. Etc.
Oracle Database Backing-up strategies: Various strategies are available for backing-up of Oracle database.
Export/Import: Export is the logical database backup in which they extract logical definitions and data from the database to a file.
Off-line Backup: It is also known as cold backup. Shutdown the database and backup all the logs, control files and data.
On-line Backup: It is also known as hot backup. If the database is in ARCHIVELOG mode, set the tablespaces into backup mode and backup their files.
RMAN Backup: RMAN utility is used to backup database while database is in off-line or online mode.
Difference between online and offline backup: There are so many difference between online and offline backup. Some of them is given below:
- Online backup is performed when database is open and available for the user while offline backup is performed wher database is unavailable for its users. It is easier to restore from the offline backup than online backup. Point-in-time recovery method is available in the online backup while it is unavailable in the offline backup.
Your Oracle database got damaged and none of above backups are available, you could use stellar oracle database recovery software to recover your database. This software is read only in nature. This Oracle recovery software completely repairs and restores all Oracle database objects, such as tables, table spaces, schemas, views, roles, constrains, indexes and sequences.
Monday, November 1, 2010
Resolving "ORA-01145: offline immediate disallowed..." Error
A DBA (Database Administrator) encounters numerous error messages while working on a production database. These error message are mainly related to network trouble, problem with instances, or database corruption. While network and instance jobs can be handled easily, the database corruption error message is very difficult to surmount. Few main causes for Oracle database corruption are Oracle bugs, virus hit, unsupported disk repair applications, and damaged hardware. After an Oracle database corruption error message appears, the instance does start further rendering to inaccessibility of saved data. In such cases, if a DBA has created complete backup of the database, then s/he has nothing to worry. However, if no backup exists, then the DBA needs to search for an effective third-party Oracle Database Recovery application.
To elaborate the above case, consider a practical case, wherein you have Oracle 9i database (Employee) on your Windows XP machine. The database is in NONARCHIVELOG mode and all the records are stored in SYSTEM tablespace. When you try to run a SQL command to access the records saved in the Employee database, you encounter the below error message:
"ORA-01145: offline immediate disallowed unless media recovery enabled."
After the above error message appears, the Employee database records become inaccessible.
Cause:
The above error message pops up when UNDOTBS01.dbf is corrupted.
Resolution:
To get rid of the above error message and to access the Employee database records, you will need to restore from a cold backup. However, doing so means that you will have to loose all your updated data. In such cases, if you want to save your data and repair Oracle database, then you will need to opt for an effective Oracle Recovery utility.
An oracle database repair application repairs logically corrupt databases in a few easy steps. The repaired database is in reusable state and can also be saved at your preferred destination. The highly advanced recovery mechanism to recover Oracle database ensures complete and maximum recovery, without making any changes in the original database. Easily downloadable from the Internet, these tools can be used by any database user.
Stellar Oracle Database Recovery is an extremely powerful Oracle database recovery application that recovers all logically corrupt databases created in Oracle 9i. With recovery of almost all Oracle database objects, tables, schemas, indexes, and more, the recovery tool can recover Oracle database irrespective of its cause of corruption.
Wednesday, October 27, 2010
Recovering Inaccessible Oracle Database Using an Oracle Database Recovery Tool
When you start an Oracle instance, it is allocated with a particular database, which is also known as mounting the database. By mounting the it, you can access and work (create, modify, or delete) on that particular database. But you may have noticed that you are unable to mount the selected database on several occasions because of different types of reasons. Some of the reasons could be corruption (because of file header corruption, abrupt system shutdown, virus infections, etc), or improper login credentials, among other reasons. You should look to address the problem according to the particular reasons. If corruption is the root cause of the inaccessible, then you should use repair Oracle database using appropriate methods failing which you must use a professional Oracle recovery software.
Let us assume a real-life scenario in which you are trying to mount an Oracle with the credentials of a database administrator, using the following command:
"oradim -new -sid %ORACLE_SID% -pfile c:\path\to\your\init.ora"
But when the command is run, the database instance does not start leaving the database in a vulnerable state.
Cause:
Such problematic situation can appear because of the following reasons:
The parameter file specified in the command cannot be opened.
You do not have the proper credentials to start and run the database instance.
The database (.DBF) file is damaged, which is why you are unable to open the database.
Resolution:
To address this problem and start the database instance, you can perform the following corrective measures:
Check and verify the parameters given in the command. Also, you should check that the parameter file is at its default location.
Make sure that you have proper rights to open and start the database instance. Try to start the instance after checking the rights.
If the previous methods do not work, you should restore it with its clean and updated backup.
If you are still unable to open the database instance, then that means the DBF file is critically damaged. You should take the services of a third-party Oracle database recovery software to resolve such issues. These database recovery tools are able to recover Oracle database and bring it to a usable state with the help of fast and sophisticated scanning algorithms.
The most reliable DBF recovery software is Stellar Phoenix Oracle Recovery, which supports recovery of Oracle created in Oracle 9i, 10g, and 11g. With the ability to recover DBF files by restoring various components including tables, views, tablespaces, synonyms, indexes, sequences, etc, this Oracle database recovery utility is compatible with Windows Server 2003 and XP.
For more details about how to repair and restore corrupted oracle database by using stellar oracle database recovery click here http://www.stellaroracledatabaserecovery.com/
Let us assume a real-life scenario in which you are trying to mount an Oracle with the credentials of a database administrator, using the following command:
"oradim -new -sid %ORACLE_SID% -pfile c:\path\to\your\init.ora"
But when the command is run, the database instance does not start leaving the database in a vulnerable state.
Cause:
Such problematic situation can appear because of the following reasons:
The parameter file specified in the command cannot be opened.
You do not have the proper credentials to start and run the database instance.
The database (.DBF) file is damaged, which is why you are unable to open the database.
Resolution:
To address this problem and start the database instance, you can perform the following corrective measures:
Check and verify the parameters given in the command. Also, you should check that the parameter file is at its default location.
Make sure that you have proper rights to open and start the database instance. Try to start the instance after checking the rights.
If the previous methods do not work, you should restore it with its clean and updated backup.
If you are still unable to open the database instance, then that means the DBF file is critically damaged. You should take the services of a third-party Oracle database recovery software to resolve such issues. These database recovery tools are able to recover Oracle database and bring it to a usable state with the help of fast and sophisticated scanning algorithms.
The most reliable DBF recovery software is Stellar Phoenix Oracle Recovery, which supports recovery of Oracle created in Oracle 9i, 10g, and 11g. With the ability to recover DBF files by restoring various components including tables, views, tablespaces, synonyms, indexes, sequences, etc, this Oracle database recovery utility is compatible with Windows Server 2003 and XP.
For more details about how to repair and restore corrupted oracle database by using stellar oracle database recovery click here http://www.stellaroracledatabaserecovery.com/
Tuesday, October 19, 2010
Oracle Database Recovery Methods
Oracle database is a relational database management system which is also known as Oracle RDBMS. Oracle RDBMS is developed by the Oracle corporation for the storing of data. Oracle database stores data phisically in the form of data files and logically in the form of tablespace. Tablespace of the oracle database contains various types memory segments some of them are index segments, data segments and many more. Sometimes tablespace of oracle database gets corrupted that cause database goes in inaccessible mode. To overcome this problem you will need a third party advanced oracle database recovery software.
Cause:
There are various causes for the oracle database corrupted. Some of them are given below:
Virus Attack: Virus attack may be the cause of corruption. To avoid this problem use an advanced anti virus program in your system.
Automatic System Shutdown: Automatic system shutdown is also affect the proper functioning of your database. To overcome these types of problems always use a power backup.
Concurrency: Multiple operation on the same database instance may also affect the database that cause database gets damaged.
There are three types of oracle recovery methods used by the database administrator to recover the corrupted oracle database. Which are given below:
Instance Recovery Method
Crash recovery Method
Media Recovery Method
Instance Recovery Method : Oracle database performs this recovery method automatically at the instance startup. This method occurs in an open database when one instance of database discovers another instance of database has crashed.
Crash Recovery Method : This recovery method also perform automatically at the instance startup. Crash recovery method occurs when either a single database instance or all database instance has corrupted.
Media Recovery Method : Unlike above two recovery methods this recovery method require you to issue the command.
Stellar Oracle Database Recovery software repairs damaged oracle 9i, 10g and 11g and recovers objects of oracle database like table spaces, tables, synonyms indexes and sequences. This oracle recovery software is designed for the window XP and 2003 operating system. You can see the preview of your recoved database with the help of demo version of the software.
Cause:
There are various causes for the oracle database corrupted. Some of them are given below:
Virus Attack: Virus attack may be the cause of corruption. To avoid this problem use an advanced anti virus program in your system.
Automatic System Shutdown: Automatic system shutdown is also affect the proper functioning of your database. To overcome these types of problems always use a power backup.
Concurrency: Multiple operation on the same database instance may also affect the database that cause database gets damaged.
There are three types of oracle recovery methods used by the database administrator to recover the corrupted oracle database. Which are given below:
Instance Recovery Method
Crash recovery Method
Media Recovery Method
Instance Recovery Method : Oracle database performs this recovery method automatically at the instance startup. This method occurs in an open database when one instance of database discovers another instance of database has crashed.
Crash Recovery Method : This recovery method also perform automatically at the instance startup. Crash recovery method occurs when either a single database instance or all database instance has corrupted.
Media Recovery Method : Unlike above two recovery methods this recovery method require you to issue the command.
Stellar Oracle Database Recovery software repairs damaged oracle 9i, 10g and 11g and recovers objects of oracle database like table spaces, tables, synonyms indexes and sequences. This oracle recovery software is designed for the window XP and 2003 operating system. You can see the preview of your recoved database with the help of demo version of the software.
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