backup 5tb raw disk

openaspace

Active Member
Sep 16, 2019
483
10
38
Italy
Hi,
I have a 5TB raw hd that is used only for 400gb now, the server storage now is full.

If I backup a raw disk of 5tb with only 400gb of data, the backup how much big will be?

thank you
 
I have a 5TB raw hd that is used only for 400gb now, the server storage now is full.
If you mean by that an VM image that is 5TB big, than it will be only the 400GB or less with compression. But once you restore it, it will create again a 5TB disk.

Depending if the storage can thin-provision and if the VMs disks are connected with scsi or sata, you can activate the discard option on the disks and run a fstrim inside the VM. This will free all non used blocks and reduce the actual size stored. But to not run over the storage capacity, best re-create the disk with a lesser size.
 

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