this post was submitted on 17 May 2026
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Moving a Proxmoc 256 MB NVMe install to larger NVMe (lemmy.ml)
submitted 1 week ago by trilobite@lemmy.ml to c/selfhosted@lemmy.world
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Finally managed to get my hands on 2x1TB NVMe's. Budgets are tight these days ... :-) They are Crucial P310 ... hope they are reliable, although I suspect nowhere near Samsung stuff.

I have a little Proxmox installation running a VM on a 256GB NVMe, which as you can imagine is tight. Is there a way of cloning this installing on one of the new NVMes?

Reason why I have 2x new NVMe is that I want to eventually get myself to Proxmox HA, so that the two machines (two little Optiplex 5070, one of which has the 256GB install) provide me with redundancy.

First thing is to clone the 256GB install to the larger NVMe. Would it be an idea to go this way: a) install 1TB new NVMe on spare Optiplex b) install Proxmox on this new machine c) find a way to replicate the whole 256GB install on the second machine (need to read the docs to see if/how this can happen) d) once second machine is up and running as a clone, remove machine with 256GB (current machine) and install the 1TB NVMe. e) do the same above process the other way around.

Do you think this will work or am I going to hit a wall? Is there a simpler way of doing this?

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[–] habitualTartare@lemmy.world 3 points 1 week ago* (last edited 1 week ago)

I recently had to increase my proxmox storage as well from an old 256 to 1TB. What I did was make a copy of /etc via PVE Host Backup and saved that on my NAS/external storage. Almost everything is in /etc/pve. Then I created backups of all the VMs and stored those on the same external storage. I then installed proxmox as normal and compared configs between backup and new configs then restored VMs from backup. The reason I did it this way is because 1) I had installed proxmox a while ago and new config > old config for stability after adding some necessary PVE scripts (e.g. intel chip, and 2) I've had weird issues before cloning drives and a fresh install was easier than risking some weird edge case troubleshooting. It also let me keep the old SSD as a backup in case something went wrong.

Edit: Also recommend going with zfs mirrored on the new install during the setup: target disks options and zfs mirrored. ZFS offers some benefits vs the default lvm.