ZFS Convert windows VM-disk to thin provision

R

rdfamily

New Member
Apr 18, 2025
22
2
3
I have a 3.7 TB zfs pool but cant use replication because the windows VM disk is 3.6TB and was not created with thin provisioning. Real usage is 1.2TB so I need to convert it to thin-provision to free up the disk space. I ran the "set refreservation=none DATA0/wm-111-disk-0" command, in Datacenter set the thin-provision checkbox, set discard and ssd on the VM disk on. But still get response when I run (zfs list -o name,refreservation,volsize DATA0/vm-111-disk-0)
DATA0/vm-111-disk-0 3.47T 3.42T
Running zfs list gets
1766695105536.png
Any way to activate ThinProv on this windows VM to free up the space.
 
The set refreservation command is not being set on the disk. Hers the result of the zfs list after running the command.
1766764121523.png
how do I force it to thin provision and release the space.
 
Please post an uncropped picture that also shows the command you used. Note that the command in the link I shared only prints commands, for safety. You need to run them yourself.
 
Last edited:
There is no zfs in front of the set .... The command is zfs set refreservation=none .... You should probably also do this for all volumes.
 
Last edited:
You must log in or register to reply here.
Top Bottom