Interesting... I have purchased a HP branded, Seagate made 72.8 GB Ultra-320 SCSI disk which (thru an inexpensive SCA-to-50pin adapter) works perfectly with my old Macs. That includes the SE/30, at least for those partitions below 2 GB

Now you have mentioned SGI... I'd like to reserve a partition on it for backup of my SGI Indy's 18 GB HD, but that's another story... Will the SGI understand the Apple Partition Map?