Re: [PLUG] how to put partitions on RAID?

[Flint Heart <N-Tropy@n-tropy.com>]

After reading your post a bit I decided to stop and just post useful info.

/dev/md0 is the partition.

make sure you have a superblock set up on your raid partitions.  you need
them if you want to run a total raid system. 

after you create your raid partition format it and copy your data over to
it. Don't use it again as a seperate partition.

here is my /etc/raidtab 

raiddev /dev/md0
        raid-level      1
        nr-raid-disks   2
        nr-spare-disks  0
        chunk-size     4
        persistent-superblock 1
        device          /dev/sda1
        raid-disk       0
        device          /dev/sdb1
        raid-disk       1
raiddev /dev/md1
        raid-level      1
        nr-raid-disks   2
        nr-spare-disks  0
        chunk-size     4
        persistent-superblock 1
        device          /dev/sda4
        raid-disk       0
        device          /dev/sdb4
        raid-disk       1
raiddev /dev/md2
        raid-level      1
        nr-raid-disks   2
        nr-spare-disks  0
        chunk-size     4
        persistent-superblock 1
        device          /dev/sda2
        raid-disk       0
        device          /dev/sdb2
        raid-disk       1

here is my mounted partitions
/dev/md1 on / type reiserfs (rw,errors=remount-ro)
/dev/md0 on /boot type ext2 (rw,errors=remount-ro)

md0 is boot
md1 is root
md2 is my swap ( is raid1 so that if 1 disc goes and swap is being used the system will stay up.)

in lilo.conf i set these options
boot=/dev/md0
raid-extra-boot=mbr-only
root=/dev/md1

hope that helps a bit.

N-Tropy

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