Extracting files off “unknown” 8 inch disks. Any thoughts…

js at cimmeri.com js at cimmeri.com
Thu May 4 19:05:13 CDT 2017

On 5/4/2017 6:39 PM, Terry Stewart via 
cctalk wrote:
>> And yet, if there were an RX02 somewhere on this VAX, I don't believe
> you'd be able to read them at all... RX02 seeming more likely with a VAX.
> Interestingly PUTR, does seem to accommodate this, and the kind of system I
> have set up (i.e. 1.2 MB 5.25 inch in CMOS even though it's an 8 inch
> drive).

If you'll have a look at the PUTR 
manual, it says on page 1,

"The 'RX02' format used by PUTR is 
actually IBM System 34 format,
         since DEC's 8" DD disks use a 
strange combination of SD headers
         with non-standard ID marks, and 
DD data fields, that can't be
         accessed with a standard PC FDC 
regardless of the software used."

- J.

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