Early 3.5" Floppy Drives
cisin at xenosoft.com
Mon Dec 12 14:50:12 CST 2005
On Mon, 12 Dec 2005, Curt @ Atari Museum wrote:
> Interesting... 600rpm? Wow!
Yes, but with a 500K data transfer rate, giving the same "720K" for DS.
> Didn't Seagate/Shugart dabble in 3.5 disk drives early on around 83 or
Alan Shugart started Shugart Associates, and produced floppy drives.
Then he sold the company to Xerox?
Then he started a new company, "Shugart Technology" and produced hard
drives. Xerox's lawyers pointed out that they had bought the name
"Shugart", so he renamed Shugart Technologies to "Seagate".
Moral: don't name your company after yourself, or you could lose ownership
of your name when you sell.
The earliest Shugart 3.5" diskettes did not have a shutter.
Later diskettes had a shutter that required manual opening, but had a
spring to slam it shut when you "pinched" the corner. They had an arrow
pointing to the correct "pinch" location.
Some relatively modern "fully automatic shutter" disks still have that
arrow! 'course most folk prob'ly think that it's to tell them which end
of the disk to put into the drive.
> >>adoption of them into its Mac's in 84' then Atari and Amiga following in
> >>85/86 with their systems using 3.5's and eventually IBM catching up in
> >>87' with its PS/2 line.
January 1986, PC-DOS 3.20 supported 720K 3.5".
Later in 1986, PC-DOS 3.30 supported 1.4M.
Q: Did IBM ever "catch up"?
Q: when did Gavilan switch from 3" to 3.5"?
Grumpy Ol' Fred cisin at xenosoft.com
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