I currently run a proxmox pve as my VM host and this bad boy recently got NVMe disks. So far, so good.
For my guests - whereas the ucs is one of them - I need to run fstrim (which also enables thin provisioned disks to reclaim space in that case)
Sadly I run into the following error message:
root@ucs:~# fstrim -v / fstrim: /: the discard operation is not supported
So I did some digging and found out that you need a kernel greater than 5 to get fstrim running. Sadly UCS runs a pretty debian kernel.
root@ucs:~# uname -a Linux ucs 4.9.0-12-amd64 #1 SMP Debian 4.9.210-1+deb9u1 (2020-06-07) x86_64 GNU/Linux
Do you guys have a backports repo that could be used?