I seem to recall that most of the "bigger" CP/M machines, which could take
hard drives, were SASI. I mean "bigger" in terms of things like S-100 as
opposed to smaller machines like the QX-10 (which had a hard drive
interface, but I think it was an expansion card that was ST-506) . I know
Xerox 820s (II?) took SASI interface, and I had others which I can't recall
at the time. AFAIK, all the 8" hard drives that I've seen were SASI.
My take on that would be that a CP/M machine, at the same
period in time, with a SASI or SCSI interface would've been bought
for business use though. Other than someone heavy into tinkering
with the hardware, not many people would've spent the money for one
for home use. As it is, enough other manufacturers used the same
DB25 connector on that era's SCSI inplementations.