Message: Unable to create volume snapshot
Task 'Full backup' failed: 'Error occurred while running the backup and recovery engine.
Additional info:
--------------------
Error code: 2
Module: 218
LineInfo: 600f7166ce397df5
Fields: $module : E:\Program Files\Acronis\BackupAndRecovery\mms.exe
Message: Error occurred while running the backup and recovery engine.
--------------------
Error code: 502
Module: 1
LineInfo: a164035b3ff39281
Fields: $module : C:\Program Files\Common Files\Acronis\BackupAndRecoveryAgent\BackupAndRecoveryService.exe
Message: Operation with partition '0-0' was terminated.
Details:
Failed to create volume snapshot.
Error code: 0x70021
Tag: 0xA5695862AAF8E63A
Failed to start creating the volume snapshot.
Error code: 0x10C442
Tag: 0x14181C22EF45B04E
The device is not ready
Error code: 0xFFF0
code = 2,147,942,421 (0x80070015)
Tag: 0xBD28FDBD64EDB8BC
--------------------
Error code: 33
Module: 7
LineInfo: a5695862aaf8e63a
Fields:
Message: Unable to create volume snapshot
--------------------
Error code: 50242
Module: 16
LineInfo: 14181c22ef45b04e
Fields:
Message: Failed to start creating the volume snapshot.
--------------------
Error code: 65520
Module: 0
LineInfo: bd28fdbd64edb8bc
Fields: code : 2147942421
Message: The device is not ready
--------------------'.

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I had to do the check disk fix like a week ago and it resolved it for a couple days. Any idea on why it keeps coming back?
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Hello Eric,
Thank you for replying.
Most likely they are getting corrupted for an unknown reason at the moment. It is difficult to say why and how without additional investigation.
Please let me know if you need additional help.
Thank you.
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I had the same error on a customer server. In my case I solved it by changing the setting for the VSS Writer on the backup job to 'Software - System provider'
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that worked 4 me too, i had serval customer Server running W2K8 R2 and SBS 2011 with this error.
THX A LOT!!
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