I have one PC which refuses to complete the image backup. The server is located on a VPS so speed is slow (about 6Mbit/s) so backing up by 512GB SSD takes up to 5 days! But it always fails after about 20-30% with the same type of error:
Error on client occurred: Error while reading from shadow copy device (1). The device is not ready… Shadow copy \?\GLOBALROOT\Device\HarddiskVolumeShadowCopy461 not present anymore. May have been removed
Here’s a good tutorial on dealing with VSS shadow copies. I recently used Option Three in that list to fix an image backup difficulty. I wasn’t too concerned about computer damage as I had good image and file backups that were recent enough.
There are several other HOWTOs on the web if this one is not your style.
VSS is how Windows creates snapshots for disks for backup. Everything you overwrite while a backup is running needs to be copied to “shadow storage”. If you overwrite more than 40GB during the backup the backup get’s interrupted because Windows automatically deletes the snapshot.
This can also be changed via UI in the advanced system settings -> system protection tab for each disk.
Hmm. Well, that didn’t go well. Three days backing up the system and got 20% of the way through before for no apparent reason, it stops with a rather terse message in the log:
Error on client occurred: Shadow copy not found. May have been deleted.
Maybe someone could just tell me the correct settings (i.e. those that are known to work) in all the bits of software I need? This is a bog-standard Windows 10 installation so I’m suspecting that there must be a document somewhere that details how to set up the backup software correctly?
Also, if it has already worked on other Windows systems, what could possibly be different in this Windows system?
You could see what your mileage is trying windows image backup, though if the issue is VSS running out of space you’ll likely hit the same issue, as would any tool imaging the system while it’s running, they all use VSS to do it.
If you really want to have an image for emergency recovery and can’t free up the space to stop VSS failing, you could work round the issue using any tool that takes offline images… Clonezilla, or something like the Macruim reflect rescue environment (booted from USB/DVD).
So on my Win10 pc my backups were also failing for some reason and i could not understand why. I then saw my Maximum space allowed is 10GB. This is just my assumption but i think this is how the process works, @uroni please correct me if im wrong.
When you start a backup, a snapshot of your PC is taken and then that is what UrBackup will actually back up. Remember, while your pc is now backing up, the system files still update. so these changes to documents, system files and so on are then written to the shadow copy (in my case the maximum allocated space was 10GB). So what happen is that when this allocated space is full, your pc then deletes the shadow copy as its full. this is then what causes your backup to fail.
You will see i bumped up the maximum allows storage to ± 100GB, im busy backing up now. i will post again to advise if it solved my problem
Use these commands in CMD (administrator)
vssadmin list shadows
vssadmin list shadowstorage ( wil your backup is running use this to see how the shadow copy storage is being used.)