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SBS 2008 unable to backup since migration

I have just moved VHD files from an old server to its replacement running 2012r2 server (hyper v). The server has 3 vhd files attached, data, exchange and the main OS (c:)

The move to the new server has been smooth, until I have attempted to run a backup. In the past I've never had issues with the backup, but currently it won't even start, failing almost instantly before it starts with error "The backup of the volume has stopped before it even started running"

The event log shows these error entries below.

Please note that if i run a once off manual backup and DO NOT select the C drive, the backup will start. As soon as the C drive is selected, the backup will fail immediately.

Any ideas would be greatly appreciated. thanks!

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Shadow copy creation failed because of error reported by ASR Writer. More info: The backup failed due to a missing disk for a dynamic volume. Please ensure the disk is online and retry the backup. (0x80042404).
 -------------------------
 
Volume Shadow Copy Service warning: ASR writer Error 0x80042404. hr = 0x00000000.
Operation:
PrepareForBackup event
PrepareForBackup event
Context:
Execution Context: ASR Writer
Execution Context: Writer
Writer Class Id: {be000cbe-11fe-4426-9c58-531aa6355fc4}
Writer Name: ASR Writer
Writer Instance ID: {17846e0f-d184-438f-ae25-800a59057a34}
 
 ---------------------
 
 
Backup started at '24/09/2016 1:19:18 PM' failed as Volume Shadow copy operation failed for backup volumes with following error code '2155348129'. Please rerun backup once issue is resolved.

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0
Jamesm007
Asked:
Jamesm007
1 Solution
 
Jamesm007Author Commented:
OK so updating the disk from basic to dynamic solved the problem for me. backup is now running!
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