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Exchange 2000 Error Message

Posted on 2008-06-13
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Last Modified: 2010-03-06
Our Exchange server (W2K, Exchange 2K) is behaving very nicely, no complaints.  However, while checking the event log recently, I came across this:

Source: ESE
Category: Database Page Cache
Event ID: 474

Information Store (3184) The database page read from the file "C:\Program Files\Exchsrvr\mdbdata\priv1.edb" at offset 43167592448 (0x0000000a0cfd3000) for 4096 (0x00001000) bytes failed verification due to a page checksum mismatch.  The expected checksum was 2334747747 (0x8b296c63) and the actual checksum was 1972333934 (0x758f6d6e).  The read operation will fail with error -1018 (0xfffffc06).  If this condition persists then please restore the database from a previous backup.

I've done some preliminary research which suggests some imminent failure of my storage subsystem.  Is this necessarily the case?  As I said, it's working fine!  Do I need to panic?
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Question by:Sherlock23
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robrandon earned 1000 total points
ID: 21780556
There is an error with that one record/pointer in the exchange store.  It could have been a one time fluke, but it could also be a hardware problem with your disks, as your research as shown.

Are you doing Exchange aware backups and are they completing succesfully?

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by:Sherlock23
ID: 21780737
Our Exchange server is replicating data in real-time to a backup server, so if our source goes down, we can immediately failover to the backup (assuming it's a hardware issue).  I know I should be running backups to an external hard drive as well.  I usually use an imaging backup solution like Acronis or ShadowProtect, which aren't specifically "Exchange aware," but should get the job done.  BTW, we're receiving this event ID every few days, so I guess it isn't a one-time fluke.  Is disaster imminent?
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Expert Comment

by:robrandon
ID: 21781165
One of the benefits of using an exchange aware backup is it checks the database for consistency when it runs.  If there is an issue in the database, the backup will fail, alerting you to the fact that there is a problem.

Since it sounds like you are not running exchange aware backups, and therefore don't know for sure if it is the case (even though you are getting the 1018 error in the event log), I highly recommend doing an offline ESEUTIL and ISINTEG.

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Author Comment

by:Sherlock23
ID: 21781393
I will follow your instructions tonight and let you know the results.  Thanks.
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Expert Comment

by:robrandon
ID: 21781845
Before you run the ESEUTIL and ISINTEG I strongly recommend having a good backup.  If you don't have an Exchange backup program, when you dismount the stores or stop the exchange services, make sure 100% you have a solid file backup of your databases and transcation logs.
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