Hello,
I've RAID-5 on 4 disks.
I've added 1 new drive as spare and run a command to grow array to 5-disks.
In the beginning, everything was fine, but now reshaping very slow -
speed=77K/sec
Kernel is 4.18.0-147.3.1.el8_1.x86_64
mdadm - v4.1 - 2018-10-01
Commands what I used:
mdadm --manage /dev/md3 --add /dev/sdb
mdadm --grow /dev/md3 --raid-devices=5
There is crypted volume on raid: md3 -> cryptvol -> FS
When I tryed unmount FS, umount command hung, however FS gone from
'df' output. Also I can't stop cryptvol, 'cryptsetup close' hung.
What I should do to don't lose my raid data?
# mdadm --detail /dev/md3
/dev/md3:
Version : 1.2
Creation Time : Mon Jan 11 14:32:08 2016
Raid Level : raid5
Array Size : 5860150272 (5588.67 GiB 6000.79 GB)
Used Dev Size : 1953383424 (1862.89 GiB 2000.26 GB)
Raid Devices : 5
Total Devices : 5
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Fri Apr 24 08:38:20 2020
State : active, reshaping
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Consistency Policy : bitmap
Reshape Status : 56% complete
Delta Devices : 1, (4->5)
Name : farm:3 (local to host farm)
UUID : e3537ea8:892da052:bfb9cb85:93156ade
Events : 59168
Number Major Minor RaidDevice State
0 8 0 0 active sync /dev/sda
4 8 48 1 active sync /dev/sdd
3 8 96 2 active sync /dev/sdg
5 8 32 3 active sync /dev/sdc
6 8 16 4 active sync /dev/sdb
Regards,
Sergey
