Exchange backup fails with the error "Backup- \\server name\Microsoft Information Store\First Storage Group WARNING: \\server name\Microsoft Information Store\First Storage Group\Mailbox Database" is a corrupt file

Article:TECH70889  |  Created: 2009-01-25  |  Updated: 2013-11-07  |  Article URL http://www.symantec.com/docs/TECH70889
Article Type
Technical Solution


Issue



When backing up the Exchange Information Store, the backup fails with the following error:

 

Error



Final error: 0xffffffff - 0xa000ffff (2684420095)
Backup- \\Server Name\Microsoft Information Store\First Storage Group WARNING: "\\Server Name\Microsoft Information Store\First Storage Group\Mailbox Database" is a corrupt file. This file cannot verify.

Verify- \\Server Name\Microsoft Information Store\First Storage Group WARNING: "Mailbox Database" is a corrupt file. This file cannot verify.

For additional information regarding this error refer to link V-79-65535-65535
 

Following Event ID is seen on the Exchange server 

Event Source: ESE
Event ID: 474
Description: 

MSExchangeIS (200) First Storage Group: The database page read from the file "D:\Program Files\Microsoft\Exchange Server\Mailbox\First Storage Group\Mailbox Database.edb" at offset 33059373056 (0x00000007b27e0000) (database page 4035567 (0x3D93EF)) for 8192 (0x00002000) bytes failed verification due to a page checksum mismatch.  The expected checksum was 772918493454625004 (0x0ab9f54652b168ec) and the actual checksum was -1220456880167807815 (0xef1010ef09ea94b9).  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. 
 Or
Information Store (4368) First Storage Group: The database page read from the file "E:\Program Files\Exchsrvr\MDBDATA\priv1.edb" at offset 4608757760 (0x0000000112b41000) (database page 1125184 (0x112B40)) for 4096 (0x00001000) bytes failed verification due to a page checksum mismatch.  The expected checksum was 6200658382346952264 (0x560d29f23d569e48) and the actual checksum was 8661961631378133072 (0x78357835f05b5050).  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.
 

Cause



The Microsoft Exchange Database Troubleshooter tool detected one or more ESE 474 events with error code -1018 in the Application log. This error is generated if the Microsoft Exchange integrity verification component determines that Exchange Server could not correctly store or retrieve Exchange database file data from the hard disk subsystem.

For more information, visit: http://technet.microsoft.com/en-us/library/bb397387%28EXCHG.80%29.aspx

 


Solution



Please consult Microsoft support or their online documentation regarding these errors.

Microsoft links;
http://technet.microsoft.com/en-us/library/bb397387%28EXCHG.80%29.aspx - ESE 474 -1018: Unrecoverable Error Detected in Database
http://support.microsoft.com/kb/810411 - Extensible Storage Engine Event IDs 474 and 477 Are Logged When You Try to Back Up the Information Store Database
http://support.microsoft.com/kb/327334 - Event ID 474 Error Indicates a Hardware Failure
 

Supplemental Materials

SourceEvent ID
Value474

SourceError Code
Value0xa000ffff

SourceUMI
ValueV-79-65535-65535


Legacy ID



325548


Article URL http://www.symantec.com/docs/TECH70889


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