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2011 May 04
2
Cannot resize btrfs volume
Hello,
I added a new disk into our RAID5 array, it looks like this:
md2 : active raid5 sdd4[3] sde4[4] sda4[0] sdc4[2] sdb4[1]
3767274240 blocks level 5, 64k chunk, algorithm 2 [5/5] [UUUUU]
# btrfs fi sh
Label: none uuid: 5534d2e7-be31-49c7-8ab7-90c5ab8afe18
Total devices 1 FS bytes used 2.24TB
devid 3 size 2.63TB used 2.63TB path /dev/md2
# mount
...
/dev/md2 on /home type btrfs (...
2012 Sep 16
12
Setting up XEN domU causes RAID5 to fail?
...issing parts of the RAID5 root
# cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4] [multipath]
md2 : active raid5 sda5[0](F) sde5[4](F) sdd5[3](F) sdc5[2] sdb5[1]
1724864512 blocks super 1.2 level 5, 512k chunk, algorithm 2 [5/2]
[_UU__]
md1 : active raid5 sda4[5](F) sde4[6](F) sdd4[7](F) sdc4[2] sdb4[1]
209713152 blocks level 5, 512k chunk, algorithm 2 [5/2] [_UU__]
md0 : active raid1 sda1[0] sde1[4] sdd1[3] sdc1[2] sdb1[1]
511936 blocks [5/5] [UUUUU]
If I check the drives I get informed that the md superblock has vanished on
the missing drive...