I have an issue with a new mdadm raid.
When i try to:
root@dys:~# mdadm --add --verbose /dev/md0 /dev/sdb1
mdadm: Cannot open /dev/sdb1: Device or resource busy
dmraid i pointed as the usual problem but it's not even installed.
Also tried to check it with lsof and no result.
Im just out of ideeas
the output of /proc/mdstat if of any help:
root@dys:~# cat /proc/mdstat
Personalities : [raid1]
md1 : active (auto-read-only) raid1 sdb2[2] sda2[1]
7858164 blocks super 1.2 [2/2] [UU]
md0 : active (auto-read-only) raid1 sda1[1]
968900472 blocks super 1.2 [2/1] [_U]
unused devices: <none>
Best Answer
What about this way:mdadm /dev/md0 -a /dev/sdb1?What is the output of
lsblk /dev/sdb1?