[vox-tech] Re: mdadm failing to start RAID5 array

[Ryan Castellucci]

On Sunday 17 April 2005 11:26 am, Ryan Castellucci wrote:
> I'm trying to use RAID5 with 4 200gb SATA drives on mandrake 10.1, and
> the array creates fine, but when I try to restart it, i get 'invalid
> argument' errors from mdadm, adding devices to /dev/md0
>
> [root at media root]# cat /etc/mdadm.conf
> DEVICE /dev/sd*1
> ARRAY /dev/md0 level=raid5 num-devices=4
> UUID=d9008623:c81eff0d:a8fc1629:4223b0b6
> devices=/dev/sda1,/dev/sdb1,/dev/sdc1,/dev/sdd1
>
> [root at media root]# mdadm -v --assemble /dev/md0
> mdadm: looking for devices for /dev/md0
> mdadm: /dev/sdd1 is identified as a member of /dev/md0, slot 4.
> mdadm: /dev/sdc1 is identified as a member of /dev/md0, slot 2.
> mdadm: /dev/sdb1 is identified as a member of /dev/md0, slot 1.
> mdadm: /dev/sda1 is identified as a member of /dev/md0, slot 0.
> mdadm: failed to add /dev/sdb1 to /dev/md0: Invalid argument
> mdadm: failed to add /dev/sdc1 to /dev/md0: Invalid argument
> mdadm: no uptodate device for slot 3 of /dev/md0
> mdadm: failed to add /dev/sdd1 to /dev/md0: Invalid argument
> mdadm: failed to add /dev/sda1 to /dev/md0: Invalid argument
> mdadm: /dev/md0 assembled from 1 drive and -1 spares - not enough to start
> the array.

output from dmesg....

md: invalid superblock checksum on sdb1
md: sdb1 has invalid sb, not importing!
md: md_import_device returned -22
md: invalid superblock checksum on sdc1
md: sdc1 has invalid sb, not importing!
md: md_import_device returned -22
md: invalid superblock checksum on sdd1
md: sdd1 has invalid sb, not importing!
md: md_import_device returned -22
md: invalid superblock checksum on sda1
md: sda1 has invalid sb, not importing!
md: md_import_device returned -22
md: md0 stopped.

-- 
Ryan Castellucci - http://ryanc.org/
GPG Key: http://ryanc.org/files/publickey.asc