root@fvdwsl-base:/ # cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid5 sdb8[0] sde8[3] sdd8[2] sdc8[1]
2920423872 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
[=>...................] resync = 9.8% (95730048/973474624) finish=451200.7min speed=32K/sec
root@fvdwsl-base:/ # umount /dev/md0
umount: /dev/md0: not mounted
root@fvdwsl-base:/ # mdadm --grow /dev/md0 --raid-devices=5
mdadm: Need to backup 768K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Device or resource busy
b1gnas wrote:i've decided to reinstall all from the beginning using 5.5 console.
root@fvdwsl-base:/ # cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid5 sda8[4](S) sdb8[0] sde8[3] sdd8[2] sdc8[1]
2920423872 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
[==>..................] resync = 10.0% (98253120/973474624) finish=113051.9min speed=129K/sec
unused devices: <none>
cat /sys/block/md0/md/sync_speed_min
echo 100000 > /sys/block/md0/md/sync_speed_min
root@fvdwsl-base:/ # cat /sys/block/md0/md/sync_speed_min
1000 (system)
root@fvdwsl-base:/ # cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid5 sda8[4](S) sdb8[0] sde8[3] sdd8[2] sdc8[1]
2920423872 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
[==>..................] resync = 10.0% (98253120/973474624) finish=251211.7min speed=58K/sec
unused devices: <none>
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