Ethan Dicks wrote:
>
> --- Carlos Murillo-Sanchez <cem14_at_cornell.edu> wrote:
> > I have this old Mac SCSI drive+enclosure, a Dataframe 20 model.
>
> My Mother had some Dataframe 20s with the OMTI 3100 MFM<->SCSI
> card inside.
>
> > Does anybody know how to set the SCSI id for this bridge?
>
> Not without looking at a picture of the card.
Here's a picture:
http://huey.ee.cornell.edu/omti3100.jpg
> > Will it look like a standard SCSI device to another apple, or
> > is this a non-standard beast?
>
> AFAIK, it is just a standard, pre-SCSI-2 interface. You will *not*
> be able to issue IDENT commands against it to divine the drive
> geometry. You have to _know_ the heads/tracks/sectors of the MFM drive
> (there are lists of those out there - I was just looking up the XT2190
> today and only found 47 hits with Altavista - it's a good keyword to
> use to find MFM drive lists)
Ok. What I was trying to do was to mount it on a system that
has IDE drives, so that SCSI ID zero was free. But the powerbook 660
failed to mount it. Note that it works fine in the original Mac 512K.
> The problem is probably the third-party controller. It may or may not
> count on a certain set of contents of the first cylinder or two. With
> the right driver disk, you could reformat that drive on a more modern
> Mac, but you want data recovery.
I see. If this is the case, then, I'm afraid that the only recovery
route is 25 x 400k floppies.
> If you can't change the SCSI id of the Hardframe, why not change the id
> of the boot disk in your target Mac?
Oh, it is an easy-access issue. I could do this on a IIci or an SE/30.
But the IIci's drive cost some effort to put in place, since it is
a 68pin model, and with the 50 pin adapterit barely fits in the bay.
And the SE/30... well, I was trying to avoid opening it. I try to
open compact macs only as a last resort, since there is always a
chance of breaking the CRT neck. Much better to change the SCSI id
in the OMTI board if possible.
Carlos.
--
Carlos Murillo-Sanchez email: cem14_at_cornell.edu
428 Phillips Hall, Electrical Engineering Department
Cornell University, Ithaca, NY 14853
Received on Tue Oct 24 2000 - 14:16:42 BST
