Mike Stevens wrote:
First, the required information
~ $ uname -a
Linux auswscs9903 3.10.0-693.21.1.el7.x86_64 #1 SMP Wed Mar 7 19:03:37 UTC 2018
x86_64 x86_64 x86_64 GNU/Linux
~ $ btrfs --version
btrfs-progs v4.9.1
~ $ sudo btrfs fi show
Label: none uuid: 77afc2bb-f7a8-4ce9-9047-c031f7571150
Total devices 34 FS bytes used 89.06TiB
devid 1 size 5.46TiB used 4.72TiB path /dev/sdb
devid 2 size 5.46TiB used 4.72TiB path /dev/sda
devid 3 size 5.46TiB used 4.72TiB path /dev/sdx
devid 4 size 5.46TiB used 4.72TiB path /dev/sdt
devid 5 size 5.46TiB used 4.72TiB path /dev/sdz
devid 6 size 5.46TiB used 4.72TiB path /dev/sdv
devid 7 size 5.46TiB used 4.72TiB path /dev/sdab
devid 8 size 5.46TiB used 4.72TiB path /dev/sdw
devid 9 size 5.46TiB used 4.72TiB path /dev/sdad
devid 10 size 5.46TiB used 4.72TiB path /dev/sdaa
devid 11 size 5.46TiB used 4.72TiB path /dev/sdr
devid 12 size 5.46TiB used 4.72TiB path /dev/sdy
devid 13 size 5.46TiB used 4.72TiB path /dev/sdj
devid 14 size 5.46TiB used 4.72TiB path /dev/sdaf
devid 15 size 5.46TiB used 4.72TiB path /dev/sdag
devid 16 size 5.46TiB used 4.72TiB path /dev/sdh
devid 17 size 5.46TiB used 4.72TiB path /dev/sdu
devid 18 size 5.46TiB used 4.72TiB path /dev/sdac
devid 19 size 5.46TiB used 4.72TiB path /dev/sdk
devid 20 size 5.46TiB used 4.72TiB path /dev/sdah
devid 21 size 5.46TiB used 4.72TiB path /dev/sdp
devid 22 size 5.46TiB used 4.72TiB path /dev/sdae
devid 23 size 5.46TiB used 4.72TiB path /dev/sdc
devid 24 size 5.46TiB used 4.72TiB path /dev/sdl
devid 25 size 5.46TiB used 4.72TiB path /dev/sdo
devid 26 size 5.46TiB used 4.72TiB path /dev/sdd
devid 27 size 5.46TiB used 4.72TiB path /dev/sdi
devid 28 size 5.46TiB used 4.72TiB path /dev/sdn
devid 29 size 5.46TiB used 4.72TiB path /dev/sds
devid 30 size 5.46TiB used 4.72TiB path /dev/sdm
devid 31 size 5.46TiB used 4.72TiB path /dev/sdf
devid 32 size 5.46TiB used 4.72TiB path /dev/sdq
devid 33 size 5.46TiB used 4.72TiB path /dev/sdg
devid 34 size 5.46TiB used 4.72TiB path /dev/sde
~ $ sudo btrfs fi df /gpfs_backups
Data, RAID6: total=150.82TiB, used=88.88TiB
System, RAID6: total=512.00MiB, used=19.08MiB
Metadata, RAID6: total=191.00GiB, used=187.38GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
That's a hell of a filesystem. RAID5 and RAID5 is unstable and should
not be used for anything but throw away data. You will be happy that you
value you data enough to have backups.... because all sensible sysadmins
do have backups correct?! (Do read just about any of Duncan's replies -
he describes this better than me).
Also if you are running kernel ***3.10*** that is nearly antique in
btrfs terms. As a word of advise, try a more recent kernel (there have
been lots of patches to raid5/6 since kernel 4.9) and if you ever get
the filesystem running again then *at least* rebalance the metadata to
raid1 as quickly as possible as the raid1 profile is (unlike raid5 or
raid6) working really well.
PS! I'm not a BTRFS dev so don't run away just yet. Someone else may
magically help you recover, Best of luck!
- Waxhead
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