On the 5215 under 7.6.1. Used Drive Setup to low level format. Success. Then used the modified HS SC Setup to partition it out into 3. One 500, the other two 1.7GB each. Then initialized each partition after setting "mount on boot" and doing a restart. Everything looked good. Put in SE, nothing. SCSI probe sees it, but won't mount.

Now I am on the SE with the custom HD SC Setup initializing the drive. Will see if that works, then maybe just two partitions. When I tried to bring up partitions it said there were too many to display? I dunno.