root@toy02:~# df -T /data
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sdb btrfs 3906909856 140031696 3765056176 4% /data
root@toy02:~# btrfs filesystem show /data
Label: data uuid: 411af13f-6cae-4f03-99dc-5941acb3135b
Total devices 2 FS bytes used 129.81GiB
devid 3 size 1.82TiB used 67.03GiB path /dev/drbd2
devid 4 size 1.82TiB used 67.03GiB path /dev/sdb
Btrfs v3.12
==> btrfs shows the wrong (raw) device /dev/sdb instead of /dev/drbd3 !
Don't be too alarmed by that, progs do a bit of user land fabrication
(wrong). kernel may /may-not be using sdb. try -m option.
just in case if it didn't, Then use mount -o devices / btrfs dev scan
<dev> option to provide the desired dev path to the kernel.
Thanks, Anand
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