Discard option not working?

[killmasta93]

Hi
Currently i have a VM on ubuntu 18.04 which shows it has 202 gigs, i added on the vm another 125 gigs on the proxmox web interface
but when i check on proxmox it shows that the vm is eating the 379 gigs so im lost howcome it not working the discard option?

this is the ubuntu VM

/dev/vda1                 344G  202G  125G  62% /

and the proxmox server in ZFS

rpool/data/vm-101-disk-0        379G  1.55T      288G  -

Thank you

 

[spirit]

discard on virtio disk (vda), is really new, I'm not sure that ubuntu 18.04 is suporting it.
try with virtio-scsi disk, it's supported since years.

(and also, enable discard option in your guest /etc/fstab or use fstrim command in cron )

 

[killmasta93]

thanks for the reply, i tried before on another vm and it works with scsi so whats really the differce between those two?