Need help on (IS) Information Store !!!

[bongtz]

Hi,

After restoring from on-line backup we get the following error message from (IS)Information Store.
Try using eseutil/r or eseutil/p but did not solve the problem.

Below are the 2 messages: -
Message1
Ms ExchangeIS (155) Synchronous read page checksum error -1018 ((1:2480434 1:2480434)(0-291552047)(0-363224005)) occurred.
Please restore the databases from a previuos backup.

Message2
MSExchangeIS (155) A read of the database file
E:\exchsrvr\MDBDATA\PRIV.EDB between offsets 0x000000025D933000 and 0x000000025D933FFF failed after 16 failed read the attempts with error -1018. There is a software or hardware problem affecting the database drive that must be corrected to preserve database integrity.

 

[zbnet]

You have restored a corrupt backup. When an online backup is taken, each database page is checked against the checksum, and if it finds any errors, the backup fails because the database is already corrupt (that is the time to restore a known good backup, ie one that reported success).

You need to go back further, get an older backup that didn't fail, and restore that. If you have circular logging disabled, you will have transaction log files on disk since the database became corrupt, so this will give you an indication how far back you need to look for your last good backup.

Also, search the KB for 1018 errors, these are the cause of the db corruption that you have, they are almost alwasy hardware-related - SCSI controller caching used to be the prime culprit. Unless you solve the underlying hardware problem, it's only a matter of time before your newly restored db becomes corrupt again.

You really need to monitor the success or failure of online backups so you know immediately a db becomes corrupt.