On Thu 2015-08-13 (15:34), anand jain wrote:
> > 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.
It is really weird: meanwhile (without any mount change or even reboot) I
get:
root@toy02:~# btrfs filesystem show
Label: data uuid: 411af13f-6cae-4f03-99dc-5941acb3135b
Total devices 2 FS bytes used 106.51GiB
devid 3 size 1.82TiB used 82.03GiB path /dev/drbd2
devid 4 size 1.82TiB used 82.03GiB path /dev/drbd3
==> no more /dev/sdb !
BUT:
root@toy02:~# df -T /data
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sdb btrfs 3906909856 111822636 3793208212 3% /data
root@toy02:~# mount | grep /data
/dev/sdb on /data type btrfs (rw)
root@toy02:~# grep /data /proc/mounts
/dev/drbd2 /data btrfs rw,relatime,space_cache 0 0
And still, Linux sees 3 HGST devices (there are real 2 drives):
root@toy02:~# hdparm -I /dev/sdb | grep Number:
Model Number: HGST HUS724020ALA640
Serial Number: PN2134P5G2P2AX
root@toy02:~# hdparm -I /dev/sdd | grep Number:
Model Number: HGST HUS724020ALA640
Serial Number: PN2134P5G2P2XX
root@toy02:~# hdparm -I /dev/sde | grep Number:
Model Number: HGST HUS724020ALA640
Serial Number: PN2134P5G2P2AX
--
Ullrich Horlacher Server und Virtualisierung
Rechenzentrum IZUS/TIK E-Mail: horlacher@xxxxxxxxxxxxxxxxxxxx
Universitaet Stuttgart Tel: ++49-711-68565868
Allmandring 30a Fax: ++49-711-682357
70550 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/
REF:<55CC488D.4020203@xxxxxxxxxx>
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