On Mon, 1 Sep 1997, Roger Merchberger wrote:
At 05:02 PM 8/31/97 -0700, you wrote:
A small nit to pick, but _all_ 3.5" floppies are 135 tracks/inch. This is
true from my SSSD 200K Tandy Portable Disk Drive 2 for my Tandy 200, all
the way up to 2.88Meg 3.5" floppy drives.
No, I meant exactly what I said - and for the record, 1.44mb 3.5" and 1.2
5.25" floppy drives are 96 tracks/inch (tpi), not 135.
You are certainly correct in that the 1.2Meg 5.25" floppies (and the 720K
80 track 5.25" drives as well) are 96 TPI. However, I would really like to
see the specifications on a 3.5" drive that's 96TPI, as I have owned nearly
30 of these drives, from 200K SSSD up to 2.88Meg DSED, and all that I've
ever owned, seen, or even heard of are all 135TPI.
You are correct, I erred! The 3.5" diskettes are at a higher tpi. There
simply is not a sufficiently large window in the disk housing to access
80 tracks at 96tpi. Sorry!
As well, all standard 3.5" media is 135TPI, and I
formatted and used HD media in my Tandy Portable Disk Drive 2. (they work
wonderfully, might I add.
If you're quoting a non-standard drive/media, you've surely stumbled upon a
rare beast indeed!
Roger Merchberger | If at first you don't succeed,
Programmer, NorthernWay | nuclear warhead disarmament should *not*
zmerch(a)northernway.net | be your first career choice.
Don Maslin - Keeper of the Dina-SIG CP/M System Disk Archives
Chairman, Dina-SIG of the San Diego Computer Society
Clinging tenaciously to the trailing edge of technology.
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see old system support at http://www.psyber.com/~tcj