NFS issue - cfs lock?


Well-Known Member
Nov 16, 2018
So, admittedly, my linux skills are not awesome, but I have been using Proxmox with a FreeNAS storage for awhile now, and I want to use one of my large NFS shares that has been working great for backups for VM images as well as I have one large (NextCloud) VM that I have been using local host storage for that I would like to move to shared cluster storage.

I have edited the storage in the PVE UI to include Images, and it shows up properly in the UI, and I was able to create a small VM on this image, but if I try to create a large VM I get cfs lock errors. I'm sure I've configured something wrong, but reading the docs I haven't been able to find it, so I appreciate any pointers.

"TASK ERROR: unable to create VM 506 - error with cfs lock 'storage-Backup48': unable to create image: got lock timeout - aborting command"

nfs: Backup48
export /mnt/Backup48/Backup48
path /mnt/pve/Backup48
content backup,images
maxfiles 20
options vers=3


  • VM-on-NFS.png
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Note that I've done some testing, and it seems it will let me create a VM with a disk image up to about 400G, but if I try 450G or greater I get the error. The share is 48TB of space with over 75% available.
Last edited:
Ok, I think I figured it out, I created a raw disk instead of qcow, and that seems to have worked... I need to play with it a bit more, but is that the right path to be on? Also, I created a second drive, but could I create a raw drive for the image as well? Thanks.


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