[Please help!] Noob needing help with storing VM's on ZFS boot pool and disk space quickly filling up, turning everything read only eventually.

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nebyneb2357

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Apr 6, 2024
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I installed Proxmox on 2x1.2TB Intel enterprise SSD's a week ago. I am running a single Debian VM. Tonight everything broke. The whole system went read-only, but I was able to delete some stuff out of /var/lib/vz. I paused my Debian VM and turned off start at boot to keep things hopefully intact until it's fixed for good.

I setup the ZFS mirror when I installed Proxmox initially. Since then, I have been storing my Debian VM in local-zfs and kept the EFI data for the Debian OMVF BIOS in local. I thought this was safe to do, but I guess not. What should I pull off of the server while it's still accessable? I think i will just fresh install. How can I make local-zfs waaaaaay bigger next time?

I've seen people such as Duinin ( I think I spelled it right) talk about something like ZFS padding causing an issue and ZFS shrinking the available size, but it seems weird that only ~25GB could be used out of 1.2TB.
 
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If you're doing a fresh install anyway, I would drop the mirror for root and just use the 2nd disk as storage for VMs / LXCs and whatever else.

It may be simpler to reinstall with ext4 + LVM root and just use ZFS for the virtual stuff and data / ISOs, it's much easier to do a full bare-metal backup and restore
 
Kingneutron said:
If you're doing a fresh install anyway, I would drop the mirror for root and just use the 2nd disk as storage for VMs / LXCs and whatever else.

It may be simpler to reinstall with ext4 + LVM root and just use ZFS for the virtual stuff and data / ISOs, it's much easier to do a full bare-metal backup and restore
Click to expand...
I re-installed Proxmox and thankfully had a backup of my VM's home directory on my NAS to restore from. It turns out that during the first install (about a week ago), when I went to make the ZFS RAD1 mirror it added my USB installation media and lowered the hd_space to the 25GB on the mirror. I have no clue why it didn't stop that from being automatically selected. I now have the full 1.2TB as a mirror.
 
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