Installing Software Raid (MDAMD) on the Appliance

On the grub boot loader do

[F6] (Other Options)
Select to Disable dmraid
[Esc]
Choose to install Ubuntu/iHRIS

Continue as usual until the partition screen

[Ctrl]-[Alt]-[F1]  will take you to a prompt

Here you do

sudo apt-get install mdadm

You will need to create partitions via fdisk (instructions not included here)

sudo fdisk /dev/sda
sudo fdisk /dev/sdb

and the partitions should be identical:

/dev/sda1 start 1 end 9242 id 83 (linux)
/dev/sda2 start 9243 end 9728 id 5 (extended)
/dev/sda5 start 9243 end 9728 id 82 (swap)
/dev/sdb1 start 1 end 9242 id 83 (linux)
/dev/sdb2 start 9243 end 9728 id 5 (extended)
/dev/sdb5 start 9243 end 9728 id 82 (swap)

Now assemble the software raid array

sudo mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda1 /dev/sdb1
sudo mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sda5 /dev/sdb5

on success it should say "mdadm: array /dev/md0 started"

To return to installed:

[Alt]-[F7]

From the partition manager thing, click "Back" and then "Forward" so that is will rescan the disks

Select 'Specify the partitions manually'
/dev/md0 is ext3 on /
/dev/md1 is swap

After rebooting, maybe modify /etc/fstab and set

 /dev/md0 to "relatime" instead of defaults