no specs given on ACARD hardware raid
I dont have any idea how well any raid system will work until its tested.

---

Xserve RAID has a 512MB cache/channel.
Each Xserve RAID has dual channels. And uses Fibre Channel as its interface.

It is a totally different beast from the ACARD pci card here.

But I only know it works because I tested one. Nothing in the specs indicates 'a priori' that this will work with well Catalyst.

http://www.apple.com/xserve/raid/

Setting this up and making it work was MUCH easier than i expected.