[clug-talk] mdadm raid 5

[John Jardine]

I setup a 6 disk (5+1hotspare) a couple of years ago.  I used this walk
through: http://slackware.osuosl.org/slackware-12.1/README_RAID.TXT and
it worked for me.

You're using GRUB so assigning the boot device will differ.


On Fri, 2009-06-12 at 12:53 -0600, Chris R. Thompson wrote:
> 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.
> 
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