JARRELLRA@vtcs1.cs.vt.EDU.UUCP (03/24/87)
Part of the speed of an hsc50 comes from the fact that it can service more than one io request at a time, but it can only service one per k.sdi. If you have two "hot" disks on the same sdi, then your performance will be measureably less than if they were split to different controllers, becaus the io would overlap.