[Coco] 5-1/4″ DS DD 80 track drive, 300 RPM mod

David Gettle david17361 at gmail.com
Thu Jul 3 08:43:08 EDT 2014

>From looking at the directory it looks like it was backed up with either he
OS-9 dsave command or a utility program called bak, both use recursive read
and wright to copy directory structures even to different size disks, Bak
will also work across multiple disks, where dsave does not.

On Tue, Jul 1, 2014 at 8:11 PM, Kandur <k at qdv.pw> wrote:

> Finally, since 1989, I was able to read my HD backup floppies.
> These were created on a 5-1/4? DS DD 80 Track 300 RPM drive.
> To find such drives these days is next to impossible.
> On the other hand, there are plenty of DS DD 80 Track 360 RPM 5-1/4?
> drives around,
> such as the Panasonic JU-475 series. I had a couple of those.
> Moving around jumpers, supposed to change it?s rpm to 300.
> Tried every possible combination, but it didn?t work with the Coco.
> Here is the solution,
> http://qdv.pw/coco/blog/2014/07/01/ds-dd-80-track-5-14-drive-300-rpm-mod-success/
> Now that I have DW4 working with both virtual and real floppy drives,
> I?d like to find a way to copy the HD backup floppies to virtual floppies
> and restore the backup set to a hard drive.
> Can anyone tell, by looking at the directory listing,  which backup
> program was used?
> Kandur
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