Hello everyone,
I have had a problem with RAID array (udev messed up disk names, I've had RAID on
disks only, without raid partitions) on Debian Etch server with 6 disks and so I decided
to rearrange this.
Deleted the disks from (2 RAID-5) arrays, deleted the md* devices from /dev,
created /dev/sd[a-f]1 Linux raid auto-detect partitions and rebooted the host.
Now the mdadm startup script is writing in loop a message like "mdadm: warning: /dev/sda1 and
/dev/sdb1 have similar superblocks. If they are not identical, --zero the superblock ... "
The host can't boot up now because of this.
If I boot the server with some disks, I can't even zero that superblock:
% mdadm --zero-superblock /dev/sdb1
mdadm: Couldn't open /dev/sdb1 for write - not zeroing
It's the same even after:
% mdadm --manage /dev/md2 --fail /dev/sdb1
mdadm: set /dev/sdb1 faulty in /dev/md2
Now, I have NEVER created /dev/md2 array, yet it show up automatically!
% cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [raid1]
md2 : active(auto-read-only) raid1 sdb1[1]
390708736 blocks [3/1] [_U_]
md1 : inactive sda1[2]
390708736 blocks
unused devices: <none>
Questions:
1. Where this info on array resides?! I have deleted /etc/mdadm/mdadm.conf
and /dev/md devices and yet it comes seemingly out of nowhere.
2. How can I delete that damn array so it doesn't hang my server up in a loop?
--
Marcin Krol
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