On Monday 11 September 2006 19:35, Gary Catalano wrote: > Anyone have experience setting up RAID on Debian Testing etch-3 (or > something similar?) I'm having a bear of a time.
I did it, but you have to do a few things which are not straight forward. This is approximately how I did it assuming two partitions on each disk, the first a 32M /boot partition, the rest all raid (I actually had a raid root partition of 4G and the rest of the disk as a raided lvm2 volume) If you already have a running system on one of the disks that you will ultimately be in the raid setup you have to add a few more steps. You should be able to work out from below exactly what they are You need to get your raid arrays up and running using mdadm, something like the following, which creates a partial array mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/hdb1 missing mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/hdb2 missing or similar. Repeat for all raid devices you need mount /dev/md1 /target mount /dev/md0 /target/boot then you need to add the output from mdadm --examine --scan into /etc/mdadm/mdadm.conf then look at /etc/default/mdadm and set the parameters in there. In particular define if you need the raid arrays setup in initrd, so that you can have a raid array as root. now you need to update the initramfs to include the raid startup update-initramfs also edit /boot/grub/menu.lst to specify /dev/md1 as the root device now we will need to copy the existing root to raid mkfs -t ext2 /dev/md0 mkfs -t whatever-u-want /dev/md1 mkdir /target mount /target /dev/md1 mkdir /target/boot mount /target/boot /dev/md0 rsync -axHq / /target rysnc -axHq /boot /target/boot now edit /target/etc/fstab to adjust mount points for the new raid arrays Now install grub in the boot sectors of both hard drives This bit I am not 100% certain of - I think it goes like this grub-install /dev/hda grub install --root-directory=/target /dev/hdb Now reboot - but select /dev/md1 as your root device - you can do that from the grub menu but not chosing the selections from the list but selecting e finally you need to start using /dev/hda in your raid array first use fdisk or cfdisk to set the partition types of /dev/hda1 and /dev/hda2 to raid. (type fd) then mdadm --add /dev/md0 /dev/hda1 mdamd --add /dev/md1 /dev/hda2 (note I think you may have to confirm that you are not making a mistake in the above two steps) I then repeat the mdadm --examine --scan update-initramfs replacing the array definitions in there with the new ones and then updating the initrd with them - although I think there ought to be no difference. -- Alan Chandler http://www.chandlerfamily.org.uk -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
