Hi @all,
I’m affected by this same issue https://forum.proxmox.com/threads/whilst-move-storage-from-local-lvm-to-truenas-zfs-over-iscsi-warning-volblocksize-4096-is-less-than-the-default-minimum-block-size-8192.135053/.
My setup also places VM disk images on a zfs over iscsi volume but I have a similar error to that thread’s OP
Warning: volblocksize (8192) is less than the default minimum block size (16384).
To reduce wasted space a volblocksize of 16384 is recommended.
I went through this TNS CORE script reffered to here https://www.truenas.com/community/resources/zvol-blocksize-modifier.233/, but it doesn’t work and i’s not clear to me if you’re meant to run it on either PVE or TNS – please excuse me I might’ve missed that part.
My TNS zfs volumes are 16k and I changed PVE’s storage.conf value to 16k (was previously set to 8k) but i know that applies to new volumes.
I’d like to optimize those volumes as restoring backups or cloning VMs is painfully slow.
Thanks for any advice you can provide.