> Greetings,
> I have a machine that I would like to institue RAID1 on. Two 4 Gig
> drives,
> the primary is partitioned with a
> /dev/hda1 /
> /dev/hda2 swap
> /dev/hda3 /var
> /dev/hda4 /usr
>
> I have the secondary drive partitioned the same way. I would like to mirror
> the partitions on the primary drive to those on the secondary drive. I have
> made an mdtab file,
>
> # mdtab entry for /dev/md3
> /dev/md3 raid1,8k,1,e46c7dcc /dev/hda3 /dev/hdb3
>
> but can't seem to get it working. Anyone got this kind of stuff running?
> Any help would be appricated.
>
> Anthony
>
You cannot make make a raid1 partition from an already existing
filesystem.
What i've done :
1. install a minimal system on / (64 MB).
2. install the package raid-tools (you might need to create a
/etc/raid/raid5.conf file to allow final setup) and a raid1-aware kernel.
3. reboot
4. mdcreate /dev/md0 /dev/hda3 /dev/hdb3
5. mdcreate /dev/md1 /dev/hda4 /dev/hdb4
6. rm /etc/raid/raid5.conf and create a /etc/raid/raid1.conf:
# Sample raid-1 configuration
# /dev/md0 : /tmp
raiddev /dev/md0
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/hda3
raid-disk 0
device /dev/hdb3
raid-disk 1
#
# /dev/md1 : /var
raiddev /dev/md1
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
device /dev/hda4
raid-disk 0
device /dev/hdb4
raid-disk 1
# end of raid1.conf
7. mkraid /etc/raid/raid1.conf
8. mdadd -ar
9. mke2fs /dev/md0
10. mke2fs /dev/md1
11. Move /var to /dev/md0:
mount /dev/md0 /mnt
cd /var ; tar cf - . |(cd /mnt ; tar xvpSf -)
mv /var /var-
umount /mnt ; mount /dev/md0 /mnt
rm -rf /var
12. Move /usr
13. sync; sync ; sync ; reboot.
You need another machine to build your custom kernel( 64 MB is not
enough for
gcc+kernel-source).
Pierre Blanchet.
