Help needed identifying old MFM drives from the excavation
derschjo at gmail.com
Sun Dec 6 21:39:00 CST 2020
On Sun, Dec 6, 2020 at 7:34 PM Chris Zach <cz at alembic.crystel.com> wrote:
> > I'd suspect that at least a few of these were from PERQ systems, given
> > their provenance. Vertex V150s and Miniscribes were commonly used in
> > the T2 models. As another listmember mentioned, Dave Gesswein's MFM
> > emulator will image these (and can decode PERQ hard drive formats.)
> Probably. I didn't realize Perqs used reasonable sized drives, there's a
> box there I've dug out with what looks like a transparent 8 inch drive
> that I will try to disassemble and get up the stairs next time. Think
> "dungeon" and "Y2" class steps....
Yeah, the later models used 5.25" media; the rare PERQ 2 used 8" Micropolis
drives, and the PERQ 1/1A used 14" Shugart SA-4000 drives.
> > (If you do manage to capture PERQ images, please let me know...)
> Absolutely. I have yet more Perq manuals as well and floppies. Did Perqs
> only use 8 inch disks or should I keep eyes out for 5.25 as well?
8" floppy media exclusively.
That's a 14" Shugart SA-4000, given that it came from Bob's basement,
definitely a PERQ disk. Tough to read without a PERQ but there may be some
options nearby you, if you manage to extract it from the basement. Make
sure the spindle and heads are parked before moving.
More information about the cctech