I've never set up a RAID volume, but perhaps my experience with my home computer can give you some insight.
I have 5 partitions: swap, /home, /boot, /usr, root (/).
Why this setup? If I do something disastrous in /home, that's all I risk. Not much of a risk if you keep current backups somewhere.
If I'm messing around in /boot, I'd better know what I'm doing, OR ELSE. But, if I do mess something up, I can boot up Knoppix and fix it. /boot is also the part that holds the bootloader, compressed kernel image, initrd, system map, etc. All seperate from anything else I might break.
/usr has the documentation and Linux source installation. I know enough about html that I can cat an html document and read what I need to know to fix something I broke. The source installation I want seperate from the rest of the system, so that if I break something in another partition, enough of the system will boot that I can still work in command-line mode.
/ holds everything else, which is stuff I seldom mess with except via installation of software and not by file edits.
I've had the unfortunate experience of breaking something (a few times), but I was still able to boot to runlevel 3 and fix it.
Last edited by bigrigdriver; 09-20-2005 at 07:10 PM.