Configuring RAID 10 with RedHat ES 4 (64 bit)

[Ben Russo]

Andy Mountford wrote:
> Hi,
> 
> I am trying to configure an array of 12 disks in a RAID 10
> configuration. All 12 disks are identical 146Gb drives.
> 
> First off, on each disk I created a single partition which spanned the
> whole disk with a system id of 0xFD. After writing the partition
> table, a print confirmed all looked good.
> 
> Secondly, I used mdadm to create 6 RAID 1 pairs. (mirrored). 
> 
> mdadm --create /dev/md0 --level=1 -n 2 /dev/sda /dev/sdb
> mdadm --create /dev/md1 --level=1 -n 2 /dev/sdc /dev/sdd
> mdadm --create /dev/md2 --level=1 -n 2 /dev/sde /dev/sdf
> mdadm --create /dev/md3 --level=1 -n 2 /dev/sdg /dev/sdh
> mdadm --create /dev/md4 --level=1 -n 2 /dev/sdi /dev/sdj
> mdadm --create /dev/md5 --level=1 -n 2 /dev/sdk /dev/sdl
> 

I think that maybe you wanted to use /dev/sda1 and /dev/sdb1
instead of /dev/sda and /dev/sdb

The disks need partition tables.

-Ben.