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My backup on one of my servers is failing once a week. This is the alert I'm getting:

DESCRIPTION: BackupVirtualDeviceFile::PrepareToFreeze: failure on backup device '{DE47BFA0-E5AD-46DD-868C-F374CB5C2EF7}1'. Operating system error 995(The I/O operation has been aborted because of either a thread exit or an application request.).

I have no idea where to start to figure out why it's fialing, and google hasn't helped me much.

If I look at the application error log on the server, I have a SQLVDI error:

SQLVDI: Loc=SignalAbort. Desc=Client initiates abort. ErrorCode=(0). Process=2028. Thread=2452. Client. Instance=. VD=Global{DE47BFA0-E5AD-46DD-868C-F374CB5C2EF7}1_SQLVDIMemoryName_0.

After that I have a MSSQLSERVER error:

BackupVirtualDeviceFile::PrepareToFreeze: failure on backup device '{DE47BFA0-E5AD-46DD-868C-F374CB5C2EF7}1'. Operating system error 995(The I/O operation has been aborted because of either a thread exit or an application request.).

And a SQLWriter backup:

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: 3271 Error state: 1, Severity: 16 Source: Microsoft SQL Server Native Client 10.0 Error message: A nonrecoverable I/O error occurred on file "{DE47BFA0-E5AD-46DD-868C-F374CB5C2EF7}1:" 995(The I/O operation has been aborted because of either a thread exit or an application request.).

How can I figure out what's causing this failure?

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