Public bug reported:
I have created a RAID0 btrfs filesystem with:
root@toy02:~# mkfs.btrfs /dev/drbd2 /dev/drbd3
root@toy02:~# mount /dev/drbd2 /mnt/new
btrfs shows wrong (raw) device /dev/sdb instead of /dev/drbd2 :
root@toy02:~# df -T /mnt/new
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/drbd2 btrfs 3906909856 9136960 3895627648 1% /mnt/new
root@toy02:~# btrfs filesystem show /mnt/new
Label: none uuid: 586a32eb-fd15-4829-a4bf-c72c6d2f9074
Total devices 2 FS bytes used 8.70GiB
devid 1 size 1.82TiB used 6.03GiB path /dev/sdb
devid 2 size 1.82TiB used 6.03GiB path /dev/drbd3
Btrfs v3.12
root@toy02:~# lf sdb /dev
lRWX - 2015-07-24 09:07 /dev/block/8:16 -> ../sdb
lRWX - 2015-07-24 09:07
/dev/disk/by-id/ata-HGST_HUS724020ALA640_PN2134P5G2P2AX -> ../../sdb
lRWX - 2015-07-24 09:07 /dev/disk/by-id/wwn-0x5000cca24ec137db ->
../../sdb
lRWX - 2015-07-24 09:07
/dev/disk/by-path/pci-0000:08:00.0-sas-0x1221000002000000-lun-0 -> ../../sdb
lRWX - 2015-07-24 09:07
/dev/disk/by-uuid/586a32eb-fd15-4829-a4bf-c72c6d2f9074 -> ../../sdb
bRW- 008,016 2015-07-24 09:07 /dev/sdb
root@toy02:~# lf drbd2 /dev
lRWX - 2015-07-23 18:50 /dev/block/147:2 -> ../drbd2
lRWX - 2015-07-23 18:50
/dev/drbd/by-disk/disk/by-id/ata-HGST_HUS724020ALA640_PN2134P5G2P2AX ->
../../../../drbd2
lRWX - 2015-07-23 18:50 /dev/drbd/by-res/data_new/0 -> ../../../drbd2
bRW- 147,002 2015-07-23 18:50 /dev/drbd2
root@toy02:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty
root@toy02:~# dpkg -l | grep btrfs-tools
ii btrfs-tools 3.12-1
amd64 Checksumming Copy on Write Filesystem utilities
root@toy02:~# apt-cache policy btrfs-tools
btrfs-tools:
Installed: 3.12-1
Candidate: 3.12-1
Version table:
*** 3.12-1 0
500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
100 /var/lib/dpkg/status
** Affects: btrfs-tools (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1477858
Title:
"btrfs filesystem show" shows wrong device
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