Re: Made an imaged disk, but can't do much with it (was: Re: Using ,dsk images on a real Apple II -- help

[Greg Buchner <null@none.invalid>]

In article <1163566113.837620.160860@f16g2000cwb.googlegroups.com>,
 cph1776@gmail.com wrote:

> Greg Buchner wrote:
> > So first off, what version of Mac OS are you using?
> >
> 
> 8.6 .....

Well, that would mean you also have a PowerPC Mac, which would have been 
my next question.

> Well, anyway, I was able to convert a .2mg image from one of the
> emulators into a Diskcopy 4.2 image, and use that to create a disk
> readable on the Apple II GS. So that took care of the filetype
> problem...
> 
> But a new problem has come up: although I can display the disk's
> directory, these imaged disks are full of I/O errors, and I can't
> read/run any files! (A quick verify with Copy II Plus
> showed almost every other block with some sort of an error....)
> 
> I tried writing the image to two different disks, so that rules out
> problems with any particular piece of media. Could it be that the disk
> drives need re-aligning or something?

Yes, the drives on PPC Macs do have problems writing to 3.5" DD ProDOS 
disks.  It's been that way since the 6/7/8100's.  With the PowerPC Macs, 
Apple switched to a cheaper 3.5" drive that has to emulate some of the 
old hardware based speed changes in software.  For some reason, it has 
problems doing this with ProDOS disks.  I keep a Quadra 650 around for 
this (and for doing Appletalk to the GS).

I've never tried DiskDup for writing disks as I've never had a problem 
with Disk Copy doing it on the Quadra.  However, I think this is one of 
those things that works for some people and not others.  Hopefully 
you're one of the ones that it works for...

Greg B.

-- 
Actual e-mail address is gregbuchner and I'm located at gmail.com