I tried to replace move one of the sides of my raid1 mirrors off a
failing drive onto one of my other drives. And immediately ran into
problems where it seems like lvm failed in really basic ways. I must
be missing something because these seem like basic operations that
should have been working for years.
# lvs --version
LVM version: 2.02.111(2) (2014-09-01)
Library version: 1.02.90 (2014-09-01)
Driver version: 4.30.0
# uname -a
Linux zzz 4.0.0-2-amd64 #1 SMP Debian 4.0.8-1 (2015-07-11) x86_64 GNU/Linux
First I tried:
# lvconvert --replace /dev/sda bits/tmp /dev/sdc
device-mapper: reload ioctl on failed: Invalid argument
Failed to suspend bits/tmp before committing changes
Device '/dev/sdc' has been left open (1 remaining references).
Device '/dev/sda' has been left open (1 remaining references).
Device '/dev/sdb' has been left open (1 remaining references).
Internal error: 3 device(s) were left open and have been closed.
I don't know what these errors indicate but it looks like the
operation completed fine except that it left behind the old
"_extracted" volumes that I had to remove manually. I would have hoped
it wouldn't remove the old mirror legs before the new mirror legs were
actually synced since that left me with a degraded mirror with no
redundant copies of the data but I guess that's a feature request.
But then the new raid volumes were 0% synced. And they weren't
resyncing. I tried lvchange --poll y and several other commands and
nothing made them start syncing. It was only when I did lvchange
--raidsyncaction=repair that they finally started syncing.
Later I tried the same operation by manually adding a third raid leg
so I could drop the old one when it was finished syncing. It did that
with lvconvert -m2. It didn't generate the errors above but it caused
the same behaviour. The new legs didn't sync at all. It was only when
I ran lvchange --raidsyncaction=repair that they finally noticed and
started syncing.
Along the way I had to reduce a volume and was met with this frustration:
# lvresize -r -L -50G bits/bits
Do you want to unmount "/bits"? [Y|n] y
y
fsck from util-linux 2.26.2
/dev/mapper/bits-bits: 15/6553600 files (6.7% non-contiguous),
5373198/26214400 blocks
resize2fs 1.42.13 (17-May-2015)
Resizing the filesystem on /dev/mapper/bits-bits to 13107200 (4k) blocks.
The filesystem on /dev/mapper/bits-bits is now 13107200 (4k) blocks long.
Unable to reduce RAID LV - operation not implemented.
Later I did another --replace with -d and -v later and got a similar error:
# lvconvert -v -d --replace /dev/sda bits/music /dev/sdc
DEGRADED MODE. Incomplete RAID LVs will be processed.
Archiving volume group "bits" metadata (seqno 228).
Creating logical volume music_rmeta_2
Creating logical volume music_rimage_2
Extracting 1 image from bits/music
activation/volume_list configuration setting not defined: Checking
only host tags for bits/music_rmeta_0
activation/volume_list configuration setting not defined: Checking
only host tags for bits/music_rimage_0
Loading bits-music_rimage_1 table (253:8)
Suppressed bits-music_rimage_1 (253:8) identical table reload.
Loading bits-music_rmeta_1 table (253:7)
Suppressed bits-music_rmeta_1 (253:7) identical table reload.
Creating bits-music_rmeta_2
Loading bits-music_rmeta_2 table (253:39)
Resuming bits-music_rmeta_2 (253:39)
Creating bits-music_rimage_2
Loading bits-music_rimage_2 table (253:40)
Resuming bits-music_rimage_2 (253:40)
Loading bits-music table (253:9)
Not monitoring bits/music
Suspending bits-music (253:9) with device flush
Suspending bits-music_rimage_1 (253:8) with device flush
Suspending bits-music_rmeta_1 (253:7) with device flush
Suspending bits-music_rimage_0 (253:6) with device flush
Suspending bits-music_rmeta_0 (253:5) with device flush
Loading bits-music_rimage_1 table (253:8)
Suppressed bits-music_rimage_1 (253:8) identical table reload.
Loading bits-music_rmeta_1 table (253:7)
Suppressed bits-music_rmeta_1 (253:7) identical table reload.
Loading bits-music_rmeta_2 table (253:39)
Suppressed bits-music_rmeta_2 (253:39) identical table reload.
Loading bits-music_rimage_2 table (253:40)
Suppressed bits-music_rimage_2 (253:40) identical table reload.
Resuming bits-music_rimage_1 (253:8)
Resuming bits-music_rmeta_1 (253:7)
Resuming bits-music_rimage_0 (253:6)
Resuming bits-music_rmeta_0 (253:5)
Resuming bits-music (253:9)
Monitoring bits/music
Removing bits-music_rmeta_0 (253:5)
Removing bits-music_rimage_0 (253:6)
Loading bits-music_rimage_1 table (253:8)
Suppressed bits-music_rimage_1 (253:8) identical table reload.
Loading bits-music_rmeta_1 table (253:7)
Suppressed bits-music_rmeta_1 (253:7) identical table reload.
Loading bits-music_rimage_2 table (253:40)
Suppressed bits-music_rimage_2 (253:40) identical table reload.
Loading bits-music_rmeta_2 table (253:39)
Suppressed bits-music_rmeta_2 (253:39) identical table reload.
Loading bits-music table (253:9)
device-mapper: reload ioctl on failed: Invalid argument
Failed to suspend bits/music before committing changes
Device '/dev/sdc' has been left open (1 remaining references).
Device '/dev/sda' has been left open (1 remaining references).
Device '/dev/sdb' has been left open (1 remaining references).
Internal error: 3 device(s) were left open and have been closed.
--
greg
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