19.12.2020 00:42, Chris Murphy пишет: > When I have a 2-device btrfs: > > devid 1 = /dev/vdb1 > devid 2 = /dev/vdc1 > > Regardless of the mount command, df and /proc/mounts shows /dev/vdb1 is > mounted. > > If I flip the backing assignments in qemu, such that: > > devid 2 = /dev/vdb1 > devid 1 = /dev/vdc1 > > Now, /dev/vdc1 is shown as mounted by df and /proc/mounts. > > But this isn't scientific. Is there a predictable logic? Is it always > the lowest devid? >
It is the lowest devid which is present (ignoring "missing" devices).
