Dell PERC 6/i and RAID monitoring
A few pointers for people trying to get Dell's PERC 6/i RAID monitoring working under Ubuntu, and any other linux for that matter. It also applies to PERC 5/i too, and... other stuff 
First, visit Dells Linux site. Have a poke about, see what's there.
Next, we need to download a tool to get information from your array. Download LSI's MegaRAID CLI tool for linux. It comes as a .RPM, so if you're an ubuntu user, you can convert it to a .deb using alien, or convert it to a .tar.gz.
# alien --to-tgz MegaCli-1.01.39-0.i386.rpm
You then have a CLI tool you can use to get all your data now! For example:
# ./opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -aALL | grep State
State: Optimal
One thing I spent a while figuring out was how to get the rebuild progress, so here's how:
# ./opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ShowProg -PhysDrv \[32:1\] -aALL
There's also a really useful cheat sheet for common tasks
Don't forget to actually monitor this output with nagios, or your favorite monitoring tool!