Well I certainly got myself into a pickle. Been a Btrfs user since 2008
and this is the first time I've had a serious problem....and I got two
on the same day (I'm separating them in a different emails).
I had 4x 4TB harddrives in a d=single m=raid1 array for about a year now
containing many media files I really want to save. Yesterday I removed
them from my desktop, installed them into a "new-to-me" Supermicro 2U
server and even swapped over my HighPoint MegaRAID 2720 SAS HBA (yes,
it's acting as a direct pass-thruHBA only). With the added space, I
also installed an additional 4TB drive to the filesystem and was
performing a rebalance with filters:
btrfs balance start -dconvert=raid10 -mconvert=raid10 /mnt/bpool-btrfs
I found that the new drive dropped off-line during the rebalance. I
swapped the drive into a different bay to see if it was backplane,cord,
or drive related. Upon remount, the same drive dropped offline. I had
another new 4TB drive and swapped it in for the dead drive.
I can mount my filesystem with -o degraded, but I can not do btrfs
replace or btrfs device add as the filesystem is in read-only mode, and
I can not mount read-write.
From my understanding, my data should all be safe as during the
balance, no single-copy files should have made it onto the new drive
(that subsequently failed). Is this a correct assumption?
Here is some btrfs data:
proton bpool-btrfs # btrfs fi df /mnt/bpool-btrfs/
Data, RAID10: total=2.17TiB, used=1.04TiB
Data, single: total=7.79TiB, used=7.59TiB
System, RAID1: total=32.00MiB, used=1.08MiB
Metadata, RAID10: total=1.00GiB, used=1023.88MiB
Metadata, RAID1: total=10.00GiB, used=8.24GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
proton bpool-btrfs # btrfs fi sh /mnt/bpool-btrfs/
Label: 'bigpool' uuid: 85e8b0dd-fbbd-48a2-abc4-ccaefa5e8d18
Total devices 5 FS bytes used 8.64TiB
devid 5 size 3.64TiB used 2.77TiB path /dev/mapper/bpool-3
devid 6 size 3.64TiB used 2.77TiB path /dev/mapper/bpool-4
devid 7 size 3.64TiB used 2.77TiB path /dev/mapper/bpool-1
devid 8 size 3.64TiB used 2.77TiB path /dev/mapper/bpool-2
*** Some devices missing
NOTE: The drives are all fully encrypted with LUKS/dm_crypt.
Please help me save the data :)
Rich
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