Bill -- the drive and disks are double-sided double density. Are you saying 
that's quad density?

I may try a different host setup again. I have five different computers that 
passed the testfdc program with varying levels of success, although none with 


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On Wednesday, August 9, 2017, william degnan <> wrote:

NOTE - I was able to make a bootable 8" DOS 6.22 disk even though it slammed 
the last three tracks, on my imaging computer.  The computer thought it was 
writing to a 1.2M 5 1/4 disk.

BUT you're saying a quad density SS disk.  I never tried that and if you say it 
does not work then I can't dispute that without trying it myself.


On Wed, Aug 9, 2017 at 12:52 PM, Richard Cini via cctalk 
<> wrote:
It's funny -- I didn't see the original reply from Bill to this message.

I am aware of  the track differences and I thought Dos would format it but just 
slam the head for the last three tracks. No such luck. It actually complains 
about the disk from the beginning.

The Qume 242 is a DSDD drive in case that was asked in the original thread, and 
should work in this situation.

I tried to format a disk with both IMD and NFORMAT (utility I downloaded) and 
neither products a disk format that DOS likes. I'm sure it's my selection of 
parameters more so than the program itself.


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On Wednesday, August 9, 2017, Chuck Guzis via cctalk <> 

On 08/09/2017 01:41 AM, william degnan wrote:

> How about booting into dos and just formatting a disk that way?

Go back and read what I wrote, Bill. If single-sided media is being
used, DOS formatting will fail as there is no single-sided high-density
format available.

Of course, if double-sided media is used, DOS formatting as a 1.2MB DOS
disk should work--up to track 76. Note that 8" drives are 77
track/cylinder, not 80, as the 5.25" drives are.

IMD can handle the issues quite readily, as its formatting facility will
do whatever you tell it to do.


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