It's a Fujitsu-Siemens with LSI MegaRaid and fibre channel. I couldn't find the manuals for the server, so did a bit of intuitive guesswork.
Within 20 minutes I had massages 4 fast 2.5" drives into a RAID array with one hot spare, put Ubuntu 8.04 server on it, sitting inside an LVM Virtual space, installed a MySQL server and copied a large database over.
Then I pulled a drive out. The array reconfigured on the fly and rebuilt itself.
It just works!
