Re: Fwd: Transporting a Profile Drive

Ok, that is clear. Much obliged!

I think I'll take this drive but at a reduced priced. I'm pretty sure it's not working but it will give me a project to play with in the New Zealand winter.

Cheers

Terry

On Thu, Jan 12, 2012 at 3:53 PM, snhirsch <snhirsch_at_email.domain.hidden> wrote:

> > > Again, I have never been successful (nor do I think anyone has) in
> > > replacing the 10M mechanism. If the Z8 microcontroller is a
> > > "piggyback" ROM version, you can replace the firmware with the 5M
> > > EPROM and format an ST412 to 5MB (wasting every other track). I've
> > > ressurrected a couple of 5M drives, so I know it works. If the Z8 is
> > > a masked-ROM variant, pickup a piggyback version on eBay and give a
> > > yell. Someone may know where the software is.
> >
> > Thanks. Just to make absolutely sure I understand what you're saying.
> > When you say "Format an ST415" you mean just a regular 10MB ST415 right?
> > As you say, every second track would be wasted but ..no worries.
>
> It doesn't matter which mechanism you are dealing with. In order to
> use a hard disk in a ProFile, it must be (a) equipped with the Apple
> electronics board (and easy swap) and (b) formatted with Apple's low-
> level scheme (may be GCR, not sure).
>
> > > Until recently, it possible to low-level format only on an Apple ///,
> > > but Al Kossow put a bunch of new software on bitsavers that includes
> > > (I think) the Lisa-based formatter. I have no experience with this,
> > > so you'll be blazing new territory :-).
> >
> > New territory. Now that would be something (-:
> >
> > I had a look around bitsavers but the software you speak of wasn't
> obvious
> > (I do have a Widget I could try this on too, if I found such software).
> > One thing I'm still not sure about. If a standard ST415 was used as
> above
> > with the "trick" of formatting every second track so you have a 5MB
> drive,
> > is it necessary for this (conventional) drive to be low level formatted
> in
> > an Apple III (or Lisa). Or can it be done in a PC?
>
> Regardless of whether you re-format an OEM Apple disk assembly or a
> cobbled-up replacement (using the Seagate mechanism and Apple
> electronics), the format must be done on the A3 or Lisa. It is
> specific to the Apple controller.
>
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