How to enable "discard" option in Windows KVM.

[dsh]

Hello,

I have a windows 10 VM that I created about 3 years ago. I have allocated it single 2TB disk and uses about 40% of it.

I can't select "Discard option" somehow.

My host system runs 4x1tb SSD in ZFS (Striped Mirrored) which allows 2TB.

My ZFS pool show over 95% usage and I would like to minimize as Windows uses only 40%.


Can somebody instruct me step by step?

Thanks in advance.

 

[Sralityhe]

I think you need virtio scsi and not virtio.

Remove the disk and re-add it with virtio-scsi, then you should be able to enable trim/discard

After you enabled discard run "disk optimisation" within windows. Then you should see free storage.

 

[tom]

I think you need virtio scsi and not virtio.

Remove the disk and re-add it with virtio-scsi, then you should be able to enable trim/discard

After you enabled discard run "disk optimisation" within windows. Then you should see free storage.

or upgrade to latest Proxmox VE 6.0 - see https://bugzilla.proxmox.com/show_bug.cgi?id=2221

 

[Sralityhe]

or upgrade to latest Proxmox VE 6.0 - see https://bugzilla.proxmox.com/show_bug.cgi?id=2221

Since windows can be really anoying with changing boot devices thats probabbly the better way

 

[dsh]

Thanks to you after updating I can enable "discard" option.

Now that I enabled what's next step for windows 10 VM?