Substituting DSHD for DSDD disks (or DS2D if you prefer)

Paul Berger phb.hfx at
Tue Jan 26 17:10:01 CST 2016

On 2016-01-26 6:48 PM, Eric Smith wrote:
> On Tue, Oct 27, 2015 at 7:47 AM, Paul Berger <phb.hfx at> wrote:
>> I would really
>> like to get a HP 9895 8" drive but they seem to be few and far between.
> Same here. And I'd like to get an 82901M 5.25" drive, and a 9122C HD 3.5".
> I was surprised to learn that the 9895, while it supports standard IBM
> 3740 single-density format, uses an HP-proprietary M2FM double-density
> format.
Well I managed to get a working controller card got a 9895 and I have it 
connected to a pair of Shugart SA860 drives I have had forever so 8" 
diskettes, my 9835A is very happy.


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