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Moving a Proxmoc 256 MB NVMe install to larger NVMe (lemmy.ml)

submitted 15 hours 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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[–] tvcvt@lemmy.ml 3 points 12 hours ago

I like @pgo_lemmy’s answer best, but instead of rebuilding the original system, (assuming you did the default ZFS installation) you can add the bigger device as part of a mirror, let it resilver, install the boot loader, and then detach the smaller device from the mirror. It should automatically grow to the bigger size once the smaller device is removed and the only downtime you’d have is from installing the bigger device. Check the PVE wiki and you should find some details on this method.