Hello,
oh dear, I fear I am in trouble:
recovery-mounted, I tried to save some data, but the system hung.
So I re-booted and sdc is now physically disconnected.
Label: none uuid: b4a6cce6-dc9c-4a13-80a4-ed6bc5b40bb8
Total devices 3 FS bytes used 4.67TiB
devid 1 size 2.73TiB used 2.67TiB path /dev/sdc
devid 2 size 2.73TiB used 2.67TiB path /dev/sdb
*** Some devices missing
I try to mount the rest again:
mount -o recovery,ro /dev/sdb /mnt/__Complete_Disk
mount: wrong fs type, bad option, bad superblock on /dev/sdb,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
root@homeserver:~# dmesg | tail
[ 447.059275] BTRFS info (device sdc): enabling auto recovery
[ 447.059280] BTRFS info (device sdc): disk space caching is enabled
[ 447.086844] BTRFS: failed to read chunk tree on sdc
[ 447.110588] BTRFS: open_ctree failed
[ 474.496778] BTRFS info (device sdc): enabling auto recovery
[ 474.496781] BTRFS info (device sdc): disk space caching is enabled
[ 474.519005] BTRFS: failed to read chunk tree on sdc
[ 474.540627] BTRFS: open_ctree failed
mount -o degraded,ro /dev/sdb /mnt/__Complete_Disk
Does work now though.
So, how can I remove the reference to the failed disk and check the data
for consistency (scrub I suppose, but is it safe?)?
Regards,
Hendrik
On 06.07.2015 22:52, Omar Sandoval wrote:
On 07/06/2015 01:01 PM, Donald Pearson wrote:
Based on my experience Hugo's advice is critical, get the bad drive
out of the pool when in raid56 and do not try to replace or delete it
while it's still attached and recognized.
If you add a new device, mount degraded and rebalance. If you don't,
mount degraded then device delete missing.
Watch out, replacing a missing device in RAID 5/6 currently doesn't work
and will cause a kernel BUG(). See my patch series here:
http://www.spinics.net/lists/linux-btrfs/msg44874.html
--
Hendrik Friedel
Auf dem Brink 12
28844 Weyhe
Tel. 04203 8394854
Mobil 0178 1874363
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