I have an issue with backup as the Sql Server writer is in a failed state.
I have Sharepoint 2010 using SQL server 2008R2 on the Premium Add-on, with an alias on the SBS machine (SQL native client 10.0 config) having followed http://technet.microsoft.com/en-us/library/gg616007.aspx
If I remove the alias, the backup works fine, but of course Sharepoint does not work. With the alias in place, the SQL Writer is in the failed state and backup fails.
From the event log:
Sqllib error: OLEDB Error encountered calling ICommandText::Execute. hr = 0x80040e14. SQLSTATE: 42000, Native Error: 3013
Error state: 1, Severity: 16
Source: Microsoft SQL Server Native Client 10.0
Error message: BACKUP DATABASE is terminating abnormally.
SQLSTATE: 42000, Native Error: 3201
Error state: 7, Severity: 16
Source: Microsoft SQL Server Native Client 10.0
Error message: Cannot open backup device '{3F3467C6-5CEB-416F-8977-46895BFEAF72}9'. Operating system error 0x80070002(failed to retrieve text for this error. Reason: 15105).
Whilst it states cannot open backup device, this error does not occur when the alias is removed.