DSQD Drives (Was: RE: Diags/Boot image for Altos 580)

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Sun Mar 17 16:30:48 2002

Actually one system did use it with hard sectoring, Northstar.
All of the others were WDC or 765 based.

Allison

-----Original Message-----
From: Richard Erlacher <edick_at_idcomm.com>
To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
Date: Sunday, March 17, 2002 2:28 PM
Subject: Re: DSQD Drives (Was: RE: Diags/Boot image for Altos 580)


>The one I had used a standard sort of FDC, so it's not likely it was
hard
>sectored, nor is it likely it used some off-beat, e.g. GCR, modulation
scheme.
>
>Dick
>
>----- Original Message -----
>From: "ajp166" <ajp166_at_bellatlantic.net>
>To: <classiccmp_at_classiccmp.org>
>Sent: Sunday, March 17, 2002 11:51 AM
>Subject: Re: DSQD Drives (Was: RE: Diags/Boot image for Altos 580)
>
>
>> From: Douglas Quebbeman <dhquebbeman_at_theestopinalgroup.com>
>>
>>
>> >> IIRC the Floppy on an Altos 580 is DSQD.
>> >
>> >Am I correct that while different from standard
>> >DSDD, they are *not* GCR drives?
>>
>>
>> DSQD generally means 80 track two sided drives such as
>> TEAC FD55F or G and double density encoding. Typically
>> they store around 800k.
>>
>> FYI that can mean hard or softsectored as that is controller
>> not drive dependent.
>>
>> >What other machines might carry these drives, can I
>> >hook one up to a standard PC controller in a box
>> >running DOS, and then duplicate the disks?
>>
>>
>> Kaypro with Advent turborom, AmproLB, Micromint SB180
>> to name a few.
>>
>> >This is good to know, ST225s still pop up from time to time...
>>
>>
>> St225, ST251 and related drives are fairly common.
>>
>> Allison
>>
>>
>
Received on Sun Mar 17 2002 - 16:30:48 GMT