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- From: djbpitt+@pitt.edu (David J Birnbaum)
- Newsgroups: comp.os.msdos.misc
- Subject: Formatting a 3.5" HD diskette to 720K - broken?
- Message-ID: <9535@blue.cis.pitt.edu.UUCP>
- Date: 12 Nov 92 19:50:31 GMT
- Sender: news+@pitt.edu
- Organization: University of Pittsburgh
- Lines: 38
-
- I thought I'd never want to format a 720K 3.5" diskette again, but I'm
- trying to use diskcopy to back up some software distributed in that
- format. OS/2 refuses to comply. I'm using a HD diskette that OS/2 was
- happy to format at 1.44K. I wiped that formatting clean with a bulk
- eraser before trying to reformat at lower density. The results:
-
- 1) If I click on the drive icon, select format, and set the density to
- 720K, the first 50% goes smoothly. The drive then begins to chug. After
- several seconds, the bar grudging slips a little beyond 50%. The drive
- then chugs forever, making no progress, until I abort.
-
- 2) If I use an OS/2 window and type 'format a: /n:9' (following
- instructions), the first 50% goes smoothly, then the chugging starts,
- then we creep up to 56%, and there we chug until I abort.
-
- 3) If I use a DOS window and the appropriate parameters, the formatting
- reaches 100% and then apports with a "DMA across 64K" error message.
- Selecting 'retry' doesn't help. The disk is unreadable when I abort the
- format.
-
- 4) If I use a DOS window and run fdformat version 1.8 with the /f:720
- option (normal 720K format, with no funny stuff), I get the same error
- message as in #3. Using the /A (BIOS) option doesn't help.
-
- All of the above are reproducible and were tried with multiple diskettes
- (which, as I mentioned, were easily formatted to 14.4K).
-
- Anyone know what gives?
-
- Thanks,
-
- David
-
- --
- Professor David J. Birnbaum djbpitt+@pitt.edu [Internet]
- The Royal York Apartments, #802 djbpitt@pittvms [Bitnet]
- 3955 Bigelow Boulevard voice: 1-412-687-4653
- Pittsburgh, PA 15123 USA fax: 1-412-624-9714
-