Jason Craig wrote:
On 10/8/2023 21:58, Andrei Borzenkov wrote: ...
I am not sure if you will be able to reboot while replace is running though. It should be OK from the btrfs point of view, but I do not know if grub can handle incomplete replacement.
No problem waiting to do a reboot, but thanks for that heads up. Thanks for all the info!
A bit late, still: When I did this on our server several years ago (was even moving a mirrored mdraid setup(*)) everything went fine, except I forgot to re-make the initrd. So when booting, it didn't have the NVME module, and couldn't read the disks :-P But it was indeed amazing to move the whole OS to completely different (and larger) disks, all that on the running system. (*) in that case, I also had to change/update mdadm.conf for the new RAID UUIDs