[Coco] [Color Computer] Creating a DSK file on a real coco..

Robert Gault robert.gault at worldnet.att.net
Tue Dec 27 17:09:49 EST 2005

OK, if you cut and pasted the Basic09 code, then the software that runs 
on my Coco hard drive system fails on yours. That must reflect 
differences in the systems, hardware or OS.

To narrow this down as much as possible, instead of using the OS 
installed on my Coco system, I booted with the latest NitrOS-9 6309 
release using its scsi driver. I then created an image of the NitrOS-9 
boot disk with no errors generated. Image size $5A000, disk 40T double 

If you still get errors with the above, then I'd say you have a hardware 

George Ramsower wrote:

> ----- Original Message ----- From: "Robert Gault" 
> <robert.gault at worldnet.att.net>
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Sent: Tuesday, December 27, 2005 9:54 AM
> Subject: Re: [Coco] [Color Computer] Creating a DSK file on a real coco..
>> The errors indicate that the disks in question could not be read for 
>> some reason. Reading one track at a time rather than one sector at a 
>> time may be putting more stress on marginal hardware. The second disk 
>> failed after reading one track $1200/$100/$12=1, the first disk at 
>> $A200/$100/$12=9.
>> If the entire disk had been read, the error would not matter because 
>> you would still have an image. If dcheck does not show any errors 
>> (presumably on the original floppies), the only thing I can think of 
>> is that the "disk" receiving the image failed. Most likely problem is 
>> that you are using a RAM disk and ran out of room. You need a large 
>> RAM disk for this process.
> I would agree with you but for the fact that I have two disks failing at 
> the same point, and I left the broken images on the hard drive to keep 
> that space full, unless it's a bad sector on the hard drive that OS9 
> keeps trying to hit. I would think that it wouldn't keep hitting that 
> sector at the same point on each attempt, especially since I'm leaving 
> the old images in place.
> So this leaves me stumped.

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