Hi All, I have Exchange 2007 SP2. i am trying to run offline defrag and isinteg , how ever getting the following errors. As if now the stores are mounted are working fine. Event Type: Error Event Source: ESE Event Category: Database Page Cache Event ID: 474 Date: 10/15/2010 Time: 5:38:43 PM User: N/A Computer: ****** Description: eseutil (4200) The database page read from the file "F:\PF DataBase\Public Folder Database.edb" at offset 103203389440 (0x000000180766c000) (database page 12598069 (0xC03B35)) for 8192 (0x00002000) bytes failed verification due to a page checksum mismatch. The expected checksum was -917382584172584593 (0xf344cd667343616f) and the actual checksum was 54108294527787597 (0x00c03b350abb224d). The read operation will fail with error -1018 (0xfffffc06). If this condition persists then please restore the database from a previous backup. This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem. For more information, click http://www.microsoft.com/contentredirect.asp. ============================================================================== Event Type: Error Event Source: ESE Event Category: Database Page Cache Event ID: 474 Date: 10/15/2010 Time: 5:57:53 PM User: N/A Computer: ******** Description: eseutil (12104) The database page read from the file "F:\PF DataBase\Public Folder Database.edb" at offset 103203389440 (0x000000180766c000) (database page 12598069 (0xC03B35)) for 8192 (0x00002000) bytes failed verification due to a page checksum mismatch. The expected checksum was -917382584172584593 (0xf344cd667343616f) and the actual checksum was 54108294527787597 (0x00c03b350abb224d). The read operation will fail with error -1018 (0xfffffc06). If this condition persists then please restore the database from a previous backup. This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem. For more information, click http://www.microsoft.com/contentredirect.asp. ================================================================================Event Type: Error Event Source: ESE Event Category: Database Page Cache Event ID: 474 Date: 10/15/2010 Time: 5:53:22 PM User: N/A Computer: ******* Description: eseutil (3012) The database page read from the file "F:\PF DataBase\Public Folder Database.edb" at offset 103203389440 (0x000000180766c000) (database page 12598069 (0xC03B35)) for 8192 (0x00002000) bytes failed verification due to a page checksum mismatch. The expected checksum was -917382584172584593 (0xf344cd667343616f) and the actual checksum was 54108294527787597 (0x00c03b350abb224d). The read operation will fail with error -1018 (0xfffffc06). If this condition persists then please restore the database from a previous backup. This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem. For more information, click http://www.microsoft.com/contentredirect.asp. ================================================================================= Event Type: Error Event Source: ESE Event Category: Database Page Cache Event ID: 474 Date: 10/15/2010 Time: 6:10:32 PM User: N/A Computer: ******** Description: MSExchangeIS (7688) Second Storage Group: The database page read from the file "F:\PF DataBase\Public Folder Database.edb" at offset 76926435328 (0x00000011e92c4000) (database page 9390433 (0x8F4961)) for 8192 (0x00002000) bytes failed verification due to a page checksum mismatch. The expected checksum was -812683555025481540 (0xf4b8c49ccbe790bc) and the actual checksum was 1186117455307699856 (0x1075ef8a91817690). The read operation will fail with error -1018 (0xfffffc06). If this condition persists then please restore the database from a previous backup. This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem. For more information, click http://www.microsoft.com/contentredirect.asp. What are the option I have now 1. Run a repair /p (chances of loosing some data)?? 2. Create a new DB and restore a Backup?? 3. Any third party utility?? Raj

Can you Create a new public folder database on another server and start moving replicas? I would avoid Option 1 if at all possible.

Please check hardware related errors if any in the system log ( RAID etc). If they are there please take care of that also . And YES as suggested create a New Public folder database on another server and start moving replicas

Second server is not an option here. Any other option for me?? Can i try this: 1. Delete this store. 2. Create a new store and restore from a backup??Raj

-1018 errors indicate possible corruption ( possible corruption). You can definatley repair it or better option is to move it as suggested it will create a new DB). The error can be from HDD, Raid timeouts etc in system event viewer, may require some firmware upgrade etc .. http://support.microsoft.com/kb/314917

Yes, you can restore from a good backup ( No need to delete it, it will overwritten). You may not be able to restore to the point of failure, but you can certainly do that. Hopefully its a full backup. You may want to copy the existing pf store to another location if its not too large just in case. And as mentioned before, ensure you have the latest drivers and firmware for your storage subsystem before doing that.

Thx Andy. My Plan is to take a offline a copy if the DB (around 130 GB) and run a repair with /p , run /d and isinteg. Lets see if that resolves the issue. IF not , then i might go ahead with a a restore from a Backup. The only probelm is, I am not sure when was the last good backup taken. I am really surprise , even after -1018, still the store is up and running.Raj

How's the recovery going on?James Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com