Repairing metadata

This task describes how to repair metadata.

Context

The metadata checker utility should be run in the following situations:
  • Periodically, to validate the integrity of SAN File System metadata
  • After reverting a fileset to a FlashCopy® image
  • Following the failure of a metadata server to ensure that no metadata corruption has occurred and to have the metadata checker utility attempt to repair any inconsistencies that are found
  • In response to error messages in the cluster log that indicate possible metadata inconsistency
  • In response to system behavior that implies possible metadata inconsistency

Steps

  1. Use either the Administrative command-line interface or the SAN File System console to access the master metadata server.
    1. If you use the Administrative command-line interface, run the startmetadatacheck command with the check option.
    2. If you use the SAN File System console, click Maintain system > Check metadata to display the Check Metadata panel. Choose the type of metadata to check and the location of the metadata to be checked.
  2. After verifying the extent of the corruption, you can run the metadata checker utility again with the repair option specified.
    Note: Before using the repair option, stop all applications that are using filesets that will be repaired. Applications may encounter errors during the salvage process, and you might have to recover some data from backup depending on what the metadata checker salvages.

Parent topic: Resolution Procedures

Related reference
reverttoimage

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IBM TotalStorage SAN File System v2.2