[Coco] So, does anyone know where to get disk drives?

[Michael Graham]

On 09/02/2013 12:15 PM, Michael Graham wrote:
> On 09/02/2013 12:10 PM, Gene Heskett wrote:
>>
>> I don't believe there is one for the 5.25" diskette, the QD has another
>> notch opposite the write protect notch.  AFAIK there is no diff in the
>> magnetic characteristics between the 48tpi rated DD disk and the 96tpi
>> rated disk other than a more critical surface scan, probably done on 
>> 1 per
>> 10,000 made basis.  But since I expect that the worlds supply of 
>> disks has
>> been made & we are just cleaning out warehouse's in Sechwan, none of the
>> currently available stuff has been subjected to even that close a look
>> unless its been preformatted to messydos FAT12 stds.  Even that isn't 
>> fool
>> proof, the verify read takes 3x the time that the format write takes, so
>> failed format disks are likely not recycled because the time 
>> consuming read
>> verify step was skipped.
>>
>> Cheers, Gene
>
> I think there must be a difference in the magnetics, or else I 
> wouldn't have such trouble using 96tpi disks in older 48tpi drives. At 
> least for the disks I have, when I try to format a 96tpi disk in a 
> 48tpi drive, I can't ever read it back.
>
> --Michael
>
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Nevermind, I should have done a basic search first.  There's no 
difference between double density and quad density disks, but there is a 
difference between those and high density disks, despite high density 
also being 96tpi.

--Michael