In my current office we upgraded a server recently and it was difficult to find a raid controller (on a pci-x card) that was supported out of the box. We found several with RedHat or SuSE drivers, but fewer with Ubuntu drivers (or official kernel support.) So, I thought I would post something here in case someone else is trying to find something that works.

The card we ended up with is an Areca ARC-1220 Sata II PCI-E Raid Controller. We installed Ubuntu Server 9.10 64-bit on the server and the card was detected by the installer and is working fine now.