* Recover from drive failure on raid10
@ 2010-11-24 10:58 Danilo Reinhardt
0 siblings, 0 replies; only message in thread
From: Danilo Reinhardt @ 2010-11-24 10:58 UTC (permalink / raw)
To: linux-btrfs
Hello,
i played a little bit with btrfs and raid levels, but now i stuck on
recovering if the first disc is missing.
First i tried removing the second disc -> works!
# mkfs.btrfs -m raid1 -d raid1 /dev/sdb /dev/sdc
# mount /dev/sdb /mnt
- copy some data
- shutdown, remove /dev/sdb, add a empty /dev/sdb, reboot
# btrfs device scan
# mount -o degraded /dev/sdb
# btrfs device add /dev/sdc
# umount /mnt
# mount /dev/sdb /mnt -> EVERYTHING OK AGAIN
But now i removed the first (sdb) device. And the steps above dont work
anymore.
If i try to:
# btrfs device scan (found my raid array)
# mount -o degraded /dev/sdb
mount asked to specify the filesystem type, this was expected because
sbd is empty. Now try with sdc
# mount -o degraded /dev/sdc
and i got a bad superblock message.
What should i do now?
Thanks!
Nino
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2010-11-24 10:58 Recover from drive failure on raid10 Danilo Reinhardt
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