If you use RedHat, see the Howto set up RedHat section in Appendix H. I have not tried this. If you use it successfully, please let me know so I can update this document.
If you don't want to try and build and debug the rescue system, you can get a generic one created from Slackware-3.4 from:
ftp.bizsystems.com/pub/raid/raidboot-0.01.tar.gzPerform the following steps:
cd /root/raidboot
mkdir mnt
gzip -d rescue.clean
losetup /dev/loop0 rescue.clean
mount /dev/loop0 mnt
copy these files
cp -p /etc/* mnt/etc
cp -p /etc/rc.d/* mnt/etc/rc.d
{or as appropriate for your system}
cp -a /lib/modules/* mnt/lib/modules
Some Linux distributions include a test for the ro/rw status of the
root file system. The rc startup files need to
have this test removed for the initrd rescue system. See the instructions in
the section on
Correctons for Rescue System.Create /etc/raidboot.conf which describes the raid boot configuration. This file may NOT contain comments in the first three lines, after that it doesn't matter.
raidboot.conf
/dev/sda1 /dev/sda2
raidboot
raid5.conf
# comments may only be placed 'after' the three
# configuration lines.
#
# This is '/etc/raidboot.conf'
#
# line one, the partition(s) containing the 'initrd' raid-rescue system
# It is not necessary to boot from these partitions, however,
# since the rescue system will not fit on floppy, it is necessary
# to know which partitions are to be used to load the rescue system
#
# line two, the path to the raidboot config information
# Where the shutdown status, etc... is located at boot time
# It does NOT include the mount point information, only 'path'
# /mntpoint/'path'
#
# line -3-, name of the raid configuration file
# Current raid configuration file i.e. raid1.conf, raid5.conf
A few more things to do and the raid systems is ready to boot.
Create rc.raidown, as described in Appendix F, and copy it to /etc/rc.d on the rescue, development, and raid system. Unmount the rescue system and zip it.
umount mnt
losetup -d /dev/loop0
mv rescue.clean rescue
gzip rescue
Copy the rescue file to the raidboot partitions.
cp rescue.gz /mnt_point(1)/raidboot
cp rescue.gz /mnt_point(2)/raidboot
Activate the raid array.
mdadd -ar
Save the good reference status to the raidboot partition
cat /proc/mdstat | grep md0 > /mnt_point(1)/raidboot/raidgood.ref
cat /proc/mdstat | grep md0 > /mnt_point(1)/raidboot/raidgood.ref
Lastly, configure the boot program as outlined in
Boot Time Configuration Parameters and reboot your system onto the
raid array.