Disk TPI's

From: Roger Merchberger <zmerch_at_northernway.net>
Date: Sun Aug 31 23:06:09 1997

At 05:02 PM 8/31/97 -0700, you wrote:

>> Don,
>> 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.

Don,

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.

As well, all standard 3.5" media is 135TPI, and I have successfully
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!

HTH,
Roger Merchberger
--
Roger Merchberger       | If at first you don't succeed,
Programmer, NorthernWay | nuclear warhead disarmament should *not*
zmerch_at_northernway.net  | be your first career choice.
Received on Sun Aug 31 1997 - 23:06:09 BST

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