XADM: Full Online Backup Must Be Done After a Defrag or Repair

• Microsoft Exchange Server, versions 4.0, 5.0, 5.5

SUMMARY

After a Microsoft Exchange database is defragmented or repaired off-line (by running the Edbutil or Eseutil utilities), a full online backup must be performed as soon as possible.

If the backup is not done, it could severely impact the ability to recover from a disaster that occurs after the off-line defragmentation or repair was done.

MORE INFORMATION

When the databases are defragmented or repaired, they get a new log signature. As a result, any logs generated after the defragmentation (or repair) process will be incompatible with the databases just as they were before the defragmentation or repair process. Therefore, if a disaster occurs and you need to restore before the next full online backup has been performed, you will not be able to recover data generated after the defragmentation (or repair) because the logs have a different signature. For this reason, it is very important that you perform a full online backup immediately after you do a defragmentation (or repair) of the database.

Keywords : XADM
Version : Windows:4.0,5.0,5.5
Platform : WINDOWS
Issue type : kbinfo