Date   : Mon, 14 May 1990 03:00:16 EDT
From   : dg%pallio.UUCP@XAIT.Xerox.COM (David Goodenough)
Subject: disk drives

Lance Tagliapietra <ucslct@uwplatt.edu> says:
> Looking at a 3.5in drive here, I would say that the pinout has to be a
> bit different than a 5.25in drive, and the 3.5in drive has no power
> connector like the 5.25in (at least the ones connected to the ps/2's
> here don't).

More food for thought: we recently got a tape backup for one of the AT's
at work, and there was a little adapter widget that plugged onto the
34 pin header on the back of the tape drive. Interesting note: the widget
had both a 34 pin header to attach to the ribbon cable, and the big Molex
4 pin power connector: these spoke to the outside world. However there
was _ONLY_ the 34 pin connector going from the widget to the tape drive.
Add to that, the fact that the two power lines from the Molex (1 and 4)
were wired to pins on the 34 pin connector going to the drive, and I'd
say the connections on this beasite _WERE_ different. According to the
docs it's supposed to replace your B drive, but I don't know how you'd
make a tape drive look like a disk drive to the 765 disk controller chip.
-- 
       dg@pallio.UUCP - David Goodenough               +---+
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