Exchg 5.5, PRIV.EDB Database Corruption, Recovery/rebuild without Backups. Event ID's 184 & 116
Posted on 2004-04-20
Situation at this site: SBS 4.5 = NT4 SP6 + Exchange 5.5 SP3. Only 4 users.
First thing noted was lack of backup for Exchange - Veritas Backup Exec job had Exchange section not ticked. asked myself was this an oversight or deliberate?
Application log showed consistent repeat, every night whilst running OnLine defrag task, of Event ID 116 followed by Event ID 184 terminating the the defrag task.
The details of ID 116 are:
Source: ESE97 Category: Database Page Cache
Synchronous read page checksum error - 1018 ((1:34763 1:178) (0-14290046) (0-49237494)) ocurred. Please restore the database from a previous backup.
the details of ID 184 are:
MSExchangeIS (417) Online defragmentation of database 'D:\ExchSrvr\MDBDATA\PRIV.EDB' terminated prematurely after encountering unexpected error - 1018
Looking to technet shows an article where these Errors cause the backup to fail - so looks like exclusion in backup exec was deliberate. Have since run backup job with Exchange and it does indeed fail.
Have noted that there are strange things happening with one of the users Contacts database consistent with corruption.
So to remedy I am proposing to export mailboxes out to .pst's then rename Priv.edb to Priv.old then restart Exchange and import the .pst's back again.
Is this too simple? would the corruption be remedied? I have never used exmerge before do I need to use this tool? At what point in the process do I run Chkdisk to look for disk problems that may have caused the corruption in the 1st place?
I would appreciate an answer that:
Provides step by step instructions,
answers my questions,
gives any heads-up to snags or possible problems along the way,
gives insight into my better learning about this issue - articles, URL's etc.
This is fairly urgent as I must fix this this weekend.