Already tried. I notice this problem happens in Redhat distributions since 7.3 to 9 . When attempting to hot add disks, it doesn't rebuild. I am wondering are there ioctls that I can call the md to start rebuild without having to wait for an auto rebuild action.
[root@www2 root]# cat /proc/mdstat<snip>
Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 sdb1[1] sda1[0]
104320 blocks [2/2] [UU]
md1 : active raid1 sdb2[1] sda2[0]
1052160 blocks [2/2] [UU]
md2 : active raid1 sdb3[1]
3076352 blocks [2/1] [_U]
md3 : active raid1 sdb5[1]
1052160 blocks [2/1] [_U]
md4 : active raid1 sdb6[1]
12635008 blocks [2/1] [_U]
Did you try:
mdadm /dev/md2 -a /dev/sda3
mdadm /dev/md3 -a /dev/sda5
mdadm /dev/md4 -a /dev/sda6
My previous experience is the only way to fix is to freshly mkraid the array. I guess something wrong with the super block.
If I can manually dd a superblock into the new disks, I am fool the md driver to make it look like already in the array. However, I think I have to edit the event count and reboot the machine. Please suggests directions.
regards, David Chow
If this doesn't work then what are the exact error messages?
Stephen
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