Dual pentium machines aren't terribly uncommon... I have a dual Pentium Pro 300Mhz Tyan Thunder 2 ATX board I mean to have uniserver recap someday. I have it running on IDE but it has a SCSI controller and a pretty fancy OPL2SA3 sound chip as well (only Windows, BeOS and NetBSD seem to get along with it) ...I put a radeon 9800 pro se in it as well.

I suppose I should drop one of my 147Gb SCA drives in it and see how that works...

As far as SCSI drives go.. the older ones almost always make interesting noises.