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ESEUtil /p and database damage

I know that when running a hard repair on an Exchange 2007 database, ESEUtil /p can cause data loss.

Is there any command I can run to find out the extent of the data loss before actually running the /p switch?

And, once I have run it, how can I find out how much data I've actually lost?
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Joe_Budden
Asked:
Joe_Budden
2 Solutions
 
mass2612Commented:
Hi,

The ESE database is not in human readable form. You could check the database first and find out what pages are damaged but its still very hard to figure out what data is stored there. If you have a backup restore the backups rather than repair. Its a last resort.

Eseutil and isinteg will generate detailed log files. If you repair you need to run eseutil /p then eseutil /d and then isinteg. You might also want to consider moving mailboxes from this old database to a new database after recovery.

http://technet.microsoft.com/en-us/library/aa997152(EXCHG.80).aspx

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Jeff BeckhamEngineerCommented:
There's really no way to identify beforehand what could be lost as a result of the repair operation.  You can run eseutil /g (Integrity) or even /k (Checksum) to try and validate the health of the database.  You can also run isinteg to scan the database for problems at a little higher level (more from the app perspective rather than just as a database structure).

Here are a couple of links to eseutil and isinteg help:

   eseutil: http://technet.microsoft.com/en-us/library/aa998249(EXCHG.80).aspx
   isinteg: http://technet.microsoft.com/en-us/library/bb125144(EXCHG.80).aspx
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