Hello,
I have a VM which has a virtual disk on ZFS with a size of 6TB, while less than 1TB is actually used. For at least a few weeks, I need to backup this VM to a USB drive which only has 4TB. At the moment, a vzdump backup still has around 3.5TB in size, which means it works once but will fail the next day because of lack of space.
I don't want to take the risk of shrinking the disk. I managed to shrink the NTFS filesystem on that virtual disk to 2TB, but backups are still 3.5TB. Would it help to overwrite free space within the virtual disk with zeros, so vzdump can just compress the free space? Do you have any other suggestions?
Bye,
Andreas
I have a VM which has a virtual disk on ZFS with a size of 6TB, while less than 1TB is actually used. For at least a few weeks, I need to backup this VM to a USB drive which only has 4TB. At the moment, a vzdump backup still has around 3.5TB in size, which means it works once but will fail the next day because of lack of space.
I don't want to take the risk of shrinking the disk. I managed to shrink the NTFS filesystem on that virtual disk to 2TB, but backups are still 3.5TB. Would it help to overwrite free space within the virtual disk with zeros, so vzdump can just compress the free space? Do you have any other suggestions?
Bye,
Andreas
