origins of IBM 3740 diskette format

From: Roger Merchberger <>
Date: Thu Feb 24 23:27:57 2005

Rumor has it that der Mouse may have mentioned these words:
> >> Hey, that suggests a fun topic: oddball sector sizes.
> >> "Normal" sector sizes would include the obvious 512 bytes, and also
> >> 128 bytes for floppies.
> > 256 is also very typical.
>I have a SCSI floppy drive - itself an oddity, in my experience - that
>has 256-byte sectors. I keep it not so much because I want a SCSI
>floppy per se as because it's the only SCSI device I have with
><512-byte sectors. (My OS of choice does not play very nice with SCSI
>devices of other than 512-byte sectors, CD drives excepted. I have
>hopes of someday fixing this. I also have a disk - a big, 5?"
>full-height drive of, I think, about 1G - that has 1024-byte sectors,
>which I keep as an example of a device with >512-byte sectors.)

If you want to store/carry something smaller with a large sector size, get
yourself a Tandy Portable Disk Drive (FM encoded 3.5" floppy drive) --> 2
sectors per track, 1280 bytes per sector. ;-)

Small, light, works off the serial port, and ontopic!!! ;-)

Roger "Merch" Merchberger

Roger "Merch" Merchberger   | "Profile, don't speculate."
SysAdmin, Iceberg Computers |     Daniel J. Bernstein          |
Received on Thu Feb 24 2005 - 23:27:57 GMT

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