PVE 8.3 node with btrfs booting into grub command line after hard reset

[Fantu]

Also on btrfs you can remove the disk and mount with degraded option.
Instead do remove, convert profile with balance, readd later and reconvert profile the best is doing only replace.
Anyway replace is good with only disk issue, but if not sure is the disk issue can be other things (like adapter) that remain risk to have issue also with new disk on replace.

If you convert to single profile keeping one disk I suggest to use dup profile for metadata so you can have more resistance and possible self-repair at least for the most delicate part without consuming much space.
For example, I always use duplicate at least for metadata, dup profile on fs with one disk or raid1 with 2 or more disks.
For details on btrfs profiles: https://wiki.tnonline.net/w/Btrfs/Profiles#Profiles_Overview

EDIT:
for the replace cases there is also this article that is good: https://wiki.tnonline.net/w/Btrfs/Replacing_a_disk

 

[udotirol]

thanks a lot, this is really much appreciated!