Re: Mac HD #M0135

[pubpc1@library.ucla.edu]

shack@onyx-206.southwind.net (Randy Shackelford) wrote:
in response to my reply:
>
>: >Good grief, we got another person trying to use a hard disk 20 on an Apple
>: >II?!? People, these DO NOT work on IIs. End of story. These are kind of
>: >collector's items these days, so find an old Mac user to sell it to and put
>: >the money in toward a SCSI drive which will work.
>
>: Unless you have a UDC, that is.  The Laser 128 should work
>: too, but I dunno because its UDC has different firmware.
>
>I take it you have a hard disk 20 and a UDC on hand and have tried it and
>found that it will work? Or is this idle speculation?
>
>And what if our friend Adalbert doesn't have a UDC? Kinda makes it moot even
>if it should happen to work eh?

Not really.  The UDC is more prevalent than you think.  It was
sold for $40 or less while Apple's unidisk card sold for four
times that and did less.  Yes, I do really have a UDC (now in
the closet).  The HD20 I saw was hooked up to a IIe with a
UDC many years ago.  FYI, it was an older style UDC (the one
that's a full sized card, as opposed to the later half sized
model that I have).


>
>: Apparently, the HD20 looks like an old Mac floppy drive, so
>: the UDC sees it.
>
>Hint: MacOS 7.5.5 supports 800K external floppy drives, but won't talk to
>a hard disk 20.

Hint: does MacOS 7.5.5 support an external 400K floppy?

The reason I say the HD20 looks like a floppy is because IIe
software kept saying that it was a 3.5" floppy (when you open
the volume, it is much larger, of course).

-Scott G.