Five and quarter drives

[Randy McLaughlin]

From: "Steve Thatcher" <melamy at earthlink.net>
Sent: Friday, February 11, 2005 6:03 PM
> the number of tracks is not going to distinguish between 360K and 1.2meg. 
> Double density 40 track drives will be 360K (double sided) or 180K (single 
> sided). An 80 track drive can be either a double density 720K drive 
> (double sided - I don't know of any single sided 80 track drives) or a 
> high density 1.2meg drive.
>
> best regards, Steve Thatcher
<snip>

Just using one manufacturer here are six diffent drives without mentioning 
1.2M:

TM100-1 - 48TPI single sided (40 track) can be used for up to 200K of 
storage depending on formatting, up to 180K on a PC.
TM100-2 - Double sided version of above drive.
TM100-3 - 96TPI single sided (80 track) can be used for up to 400K of 
storage depending on formatting.
TM100-4 - Double sided version of above drive.
TM100-3M - 100TPI single sided (I'm not sure if it is 77 or 80 track), rare 
used on Micropolis systems.
TM100-4M - Double sided version of above drive.

Adding one other 5.25" drive from another manufacturer:

SA400 - 48TPI single sided (35 track).


All of the above specific drives are full height but 1/2 height drives for 
most of these drives are available.


Randy
www.s100-manuals.com