Risk of data loss when you run certain EVSVR Repair operations

Article:HOWTO75013  |  Created: 2012-03-31  |  Updated: 2013-07-12  |  Article URL http://www.symantec.com/docs/HOWTO75013
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How To


Subject


Risk of data loss when you run certain EVSVR Repair operations

In some circumstances, data loss can occur when you run any of the following Repair operations:

  • Archives

  • ArchivesDirectory

  • DatabaseLinkages

  • DatabaseReferences

  • DeleteSurplusReferences

We strongly recommend that you contact Symantec Technical Support before you run any of these operations.

The circumstances in which you can experience data loss include the following:

  • The DatabaseReferences or Archives operation has failed to recreate all the missing records in the fingerprint databases and vault store databases. This issue typically arises when some of the Archive records and ArchiveFolder records in the Directory database are missing

  • You have specified an inappropriate date range for the DatabaseReferences or Archives operation. This can lead to the situation where the operation does not process some savesets and SIS parts that it ought to repair.

  • You have selected the option Require Index Entries for the DatabaseReferences or Archives operation. However, some savesets do not have index information because one or more of the following conditions applies:

    • You have chosen to defer indexing (that is, Enterprise Vault does not index files as they are archived).

    • You have a backlog of index operations.

    • An index rebuild is in progress.

  • You have run a DatabaseLinkages operation after a DatabaseReferences or Archives operation that failed to repair all the repairable items.

  • You have run a DeleteSurplusReferences operation after a DatabaseReferences or Archives operation that failed to repair all the repairable items.

  • You have not run a DatabaseLinkages operation after a DatabaseReferences or Archives operation that successfully completed.

For these reasons, it is important to ensure that the DatabaseReferences or Archives operation has repaired all the repairable items before you proceed with any other Repair operation.

For example, you can experience data loss when you run a DeleteSurplusReferences operation after a DatabaseReferences operation. This situation can arise if the DatabaseReferences operation has failed to repair all the saveset records in the vault store databases for some reason. When you subsequently run the DeleteSurplusReferences operation, certain SIS parts may incorrectly appear to be unused because the associated saveset records that should reference them were not repaired. For these SIS parts, the DeleteSurplusReferences operation then deletes both the corresponding records in the fingerprint database and any uncollected SIS part files on disk. For this reason, we recommend that you only run a DeleteSurplusReferences operation when you know that your environment is consistent and any missing items are irrecoverable.

See About EVSVR

See Repair operations in EVSVR

See Choosing a suitable EVSVR Repair operation

See EVSVR repair procedures

See About the EVSVR operation settings


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Article URL http://www.symantec.com/docs/HOWTO75013


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