I am seeing the following errors in the server report;
Exchange VSS Writer (instance 87d881a4-2e80-4d02-b1b0-89
:15) has completed the backup of database ''Public Folder Database 1583833754'' with errors. The backup did not complete successfully, and no log files were truncated for this database.
Information Store (2624) Shadow copy instance 15 aborted.
At ''11/10/2014 06:48:05'' database copy ''Mailbox Database'' on this server appears to have an I/O error that it may be able to repair. To help identify the failure, consult the Event log on the server for other storage and "ExchangeStoreDb" events. Service recovery was attempted by failover to another copy. The failover was unsuccessful in restoring the service because of the following error: ''There is only one copy of this mailbox database (Mailbox Database). Automatic recovery is not available..
Information Store (2624) Mailbox Database: The database page read from the file "E:\Program Files\Microsoft\Exchange Server\V14\Mailbox\Mailbox
Database\Mailbox Database.edb" at offset 33294450688 (0x00000007c0810000) (database page 1016065 (0xF8101)) for 32768 (0x00008000) bytes failed verification due to a page checksum mismatch. The expected checksum was [b7d84827304d6cdd:a88ba88b
8b] and the actual checksum was [49b549b56370c01b:a88ba88b
8b]. 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
This is a HP Proliant server and have checked out the hard drives and none are reporting an issue as such.
Reading through the various options, it would appear that a simple way to resolve this is to create another mail store and then move the users from one store to the other. However, as this is a SBS 2011 its not clear whether it is possible to do this with this product.
It would appear that this has been occurring for just over a week, however, I don't want to lose any data so am looking for resolution to this with as little data loss as reasonably practicable. It seems to me from the report that the issue may be associated with the public folder database and not the main store, so it may be that we only need to perform maintenance actions on the public folder in any case?
If this means manual export of all users pst (there are only 11 users) and then restore, so be it.
Any suggestions as to the best way forward would be gratefully received.