Any info on MTI 240 drive emulator?

Josh Dersch derschjo at
Mon Apr 18 15:07:23 CDT 2016

On Mon, Apr 18, 2016 at 10:06 AM, Ethan Dicks <ethan.dicks at> wrote:

> On Sat, Apr 16, 2016 at 11:39 PM, Josh Dersch <derschjo at> wrote:
> > Hi all --
> >
> > I just picked up an interesting device, it appears to be a drive emulator
> > that adapts DEC SDI to either ESDI or MFM drives (I would guess ESDI,
> but no
> > real way to be sure.)  It's manufactured by "Micro Technology" and is
> > labeled as an "MDI 240" on the front.  (On the rear as "SPEC.MDI-240",
> P/N
> > "970176-000".)
> I have a box at home with _a_ SDI->ESDI board and two 600MB ESDI
> drives.  I will see about cracking it open to see what's inside.
> I would have no docs, though... mine came to me in working order and I
> just plugged it in.  I'm using it with a KDB50 and my VAX8300.  No
> funny business.  It just works.

Thanks.  Even lacking docs, if you have the same (or similar) SDI->ESDI
board that's in mine it would be useful to know.  It'd probably also be
interesting to know what model drives you have in there.

- Josh

> -ethan

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