I have been busting my butt trying to get my HIGHPOINT rocketraid card (2220) working with ubuntu.
-compiled highpoint's driver for my system
-upgraded kernel to 2.6.16.18 AND enabled highly experimental support for the Marvell MV88SX6081 chipset which apparently is what is on this raid card.
-loaded the highpoint compiled drivers and when I do so some devices do show up in /dev, but when i fdisk /dev/sdb (them) I get 'unable to read /dev/sdb'.
After editing my fstab file, and performing a #sudo mount /dev/sdb, i get the following:
mount: wrong fs type, bad option, bad superblock on /dev/sdb,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so


I GIVE UP!

IF ANYONE HAS GOTTEN A HIGHPOINT RAID CARD TO WORK, PLEASE HELP ME!

Hardware;
dual opterons, tyan 2875 mobo, 2gb ram,
rocketraid sata card, 6 x 400gb sata drives
Software:
ubuntu debian linux 6.06 (dapper)
kernel 2.6.16.18

I don't have any experience with ubuntu but can tell from slackware with an onboard raid that the name of it is /dev/ataraid/d0p*.

Might try /dev/sataraid/d0p*.