[clug-talk] mdadm raid 5

[Chris R. Thompson]

Hello,

   I am configuring an Ubuntu 9.04 Desktop with 4 disks; the primary is a single disk where the O/S resides. The other 3 I am trying to configure in a software raid 5. To do this I am using mdadm; the problem I am having is that post configuration using cfdisk and the mdadm --create command, I restart, and the OS tries to boot from the raid 5, rather then the single disk. I am then stuck into the (initramfs) prompt and forced to repair by uninstalling mdadm.
    I am of the impression that the /boot is actually modified when installing and configuring the mdadm.
    The question at this point, is where do I need to configure the "boot" option; and what would it be. The technical details are below.
    single disk is /dev/sda1
    raid array 5
    /dev/sdb1
    /dev/sdc2
    /dev/sdd2
    the /etc/mdadm/mdadm.conf
    DEVICE partitions
            ARRAY /dev/md0
            level=raid5
            num-devices=3
            metadata=00.90 spares=0
            UUID=275d06f7:703df9fd:baf54294:a0156108
            MAILADDR root

Sincerely,
Chris Thompson
Done Right I.T.