On Fri, Jul 04, 2003 at 12:48:59PM -0500, David Blevins wrote:
> If you are just going to use the extra 40gb for on-disk backups, I'd
> say forget the RAID-5 and do a RAID-1 with the two 40gb drives.
Absolutely. To expand upon that suggestion:
IDE Channel 1: 40GB Master, 20GB Slave
IDE Channel 2: 40GB Master, Other Slave
Mirror the two 40GB drives as masters on separate channels. You may
want a small partition on each disk for the initial root, otherwise use
the 'fd' partition type for "Linux RAID Autodetect".
I would then partition out the RAID device using LVM. Create one volume
group for the RAID array, and then dole out Logical volumes for your
functional partitions: /usr, /var, /opt, /home.
Use your 20GB drive as your scratch drive. For processes that have lots
of write operations, a mirrored RAID array will slow you down. You can
use the unmirrored disk for things like program compilations or file
processing. Use it for an alternative /tmp directory; point your
Netscape/Mozilla temp-files cache there; etc.
To get the most out of your scratch partitions, I wouldn't even bother
with journaled filesystems. Although reiserfs is pretty fast, you could
probably get by with an ext2 filesystem w/no reserve blockes for the
super-user:
# pvcreate /dev/hdb
# vgscan; vgcreate --autobackup y vg_scratch /dev/hdb
# lvcreate --autobackup y --name lv_scratch --size 20g vg_scratch
# mkfs.ext2 -L scratch -m 0 /dev/vg_scratch/lv_scratch
# echo "/dev/vg_scratch/lv_scratch /scratch auto defaults 0 2" >> \
/dev/fstab
# mkdir /scratch; mount /scratch
The scratch drive may also be a good place to put your swap, but
remember, if the scratch drive crashes, your kernel may panic.
Have fun. ;-)
--
Chad Walstrom <chewie at wookimus.net> http://www.wookimus.net/
assert(expired(knowledge)); /* core dump */
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