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From: rjd@tiger.UUCP
Newsgroups: comp.sys.att
Subject: Re: cpio for DOS and 3b2 - followup
Message-ID: <144800003@tiger.UUCP>
Date: Fri, 16-Oct-87 12:52:00 EDT
Article-I.D.: tiger.144800003
Posted: Fri Oct 16 12:52:00 1987
Date-Received: Sun, 18-Oct-87 23:44:27 EDT
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Nf-From: tiger.UUCP!rjd    Oct 16 11:52:00 1987


> 1. The 3B2 floppy drive formats 360K floppies so that they can store
>    720K bytes by writing 80 tracks/side, two sides, with 9 sectors/track.
>    Since there are 512 bytes/sector, the total capacity is 737280 bytes.

  I beg to differ.  (But of course it is possible that I am overlooking
something.)
  Do this (with a formatted floppy in the 3B2 drive):

# dd if=/dev/diskette of=/usr/tmp/temp

  Your output file, the image of all information on the floppy minus the
format, comes to 728,064 bytes.  This may have some bearing on what you
are attempting (since you do not want to copy the format anyway).
BTW - this is the best method for copying 3B2 diskettes, just put another
formatted floppy in the drive, do a:

# dd if=/usr/tmp/temp of=/dev/diskette

And you have a copy....

Randy