I tried my 3200 in my P4S8X and it ran like crap. Went back to IDE until I can get a real mobo and a real scsi card. Most likley an incompatibility with the mobo and the card. Works 500% better in my real Compaq servers tho. I also have Smart 221 cards on a couple BH6 mobo's and they work OK, nothing stellar as they're 450mhz boxes, but they were still faster than in my P4S8X.
And yes, if you are lucky enough to get the DOS boot disk to work, great, otherwise you have to setup the 1st array in a different box, then move it and the drives to its new home. That boot disk 99% of them time doesnt work on non-compaq hardware. The config is stored on the drives, so you could technically build an array by just plugging the scsi cable into the 2nd port of an existing server