On 3/23/2021 5:36 PM, Nigel Croxon wrote:
Oleksandr,
Can you post your dmesg output when running the commands?
I've back down from 5.11 to 5.8 and I still see:
[ +0.042694] md/raid0:md126: raid5 must have missing parity disk!
[ +0.000001] md: md126: raid0 would not accept array
Thanks, Nigel
Hello Nigel,
I've switched to 4.18.0-240.el8.x86_64 kernel (I have RHEL8.3) and I still
have the same results, issue is still easily reproducible when patch
4ae96c8 is applied.
Cropped test logs with and w/o your patch:
# git log -n1 --oneline
f94df5c (HEAD -> master, origin/master, origin/HEAD) imsm: support for
third Sata controller
# make clean; make; make install-systemd; make install
# mdadm -CR imsm0 -e imsm -n4 /dev/nvme[0-3]n1 && mdadm -CR volume -l0
--chunk 64 --size=10G --raid-devices=1 /dev/nvme0n1 --force
# mdadm -G /dev/md/imsm0 -n2
# dmesg -c
[ 393.530389] md126: detected capacity change from 0 to 10737418240
[ 407.139318] md/raid:md126: device nvme0n1 operational as raid disk 0
[ 407.153920] md/raid:md126: raid level 4 active with 1 out of 2 devices,
algorithm 5
[ 407.246037] md: reshape of RAID array md126
[ 407.357940] md: md126: reshape interrupted.
[ 407.388144] md: reshape of RAID array md126
[ 407.398737] md: md126: reshape interrupted.
[ 407.403486] md: reshape of RAID array md126
[ 459.414250] md: md126: reshape done.
# cat /proc/mdstat
Personalities : [raid0] [raid6] [raid5] [raid4]
md126 : active raid4 nvme3n1[2] nvme0n1[0]
10485760 blocks super external:/md127/0 level 4, 64k chunk,
algorithm 0 [3/2] [UU_]
md127 : inactive nvme3n1[3](S) nvme2n1[2](S) nvme1n1[1](S) nvme0n1[0](S)
4420 blocks super external:imsm
unused devices: <none>
# mdadm -Ss; wipefs -a /dev/nvme[0-3]n1
# dmesg -C
# git revert 4ae96c802203ec3cfbb089240c56d61f7f4661b3
# make clean; make; make install-systemd; make install
# mdadm -CR imsm0 -e imsm -n4 /dev/nvme[0-3]n1 && mdadm -CR volume -l0
--chunk 64 --size=10G --raid-devices=1 /dev/nvme0n1 --force
# mdadm -G /dev/md/imsm0 -n2
# dmesg -c
[ 623.772039] md126: detected capacity change from 0 to 10737418240
[ 644.823245] md/raid:md126: device nvme0n1 operational as raid disk 0
[ 644.838542] md/raid:md126: raid level 4 active with 1 out of 2 devices,
algorithm 5
[ 644.928672] md: reshape of RAID array md126
[ 697.405351] md: md126: reshape done.
[ 697.409659] md126: detected capacity change from 10737418240 to 21474836480
# cat /proc/mdstat
Personalities : [raid0] [raid6] [raid5] [raid4]
md126 : active raid0 nvme3n1[2] nvme0n1[0]
20971520 blocks super external:/md127/0 64k chunks
md127 : inactive nvme3n1[3](S) nvme2n1[2](S) nvme1n1[1](S) nvme0n1[0](S)
4420 blocks super external:imsm
Do you need more detailed logs? My system/drives configuration details?
Regards,
Oleksandr Shchirskyi
