home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.os.msdos.misc
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!sdd.hp.com!elroy.jpl.nasa.gov!ames!pacbell.com!att-out!cbfsb!cbnews!cbnewsm!evans1
- From: evans1@cbnewsm.cb.att.com (Dan Evans)
- Subject: Re: Using HD disks as DD disks
- Organization: AT&T
- Distribution: usa
- Date: Wed, 23 Dec 1992 20:22:19 GMT
- Message-ID: <1992Dec23.202219.114@cbnewsm.cb.att.com>
- Keywords: disks, disk drive
- References: <jeric.67@berkp.uadv.uci.edu>
- Lines: 32
-
- In article <jeric.67@berkp.uadv.uci.edu> jeric@berkp.uadv.uci.edu (Jeric Woo) writes:
- >I have some high density 3.5" and 5.25" diskettes that I would like to
- >use as low density diskettes. However, whenever I attempt to format them
- >(using low density drives) I get either the messages "Bad or Invalid Media"
- >or the message "Track 0 Bad, Disk Unusable."
- >
- >Why can't I do so? Are the any other physical differences between high
- >density diskettes and low density diskettes (I know that 3.5" HD has a hole
- >at the upper left hand corner, and that maybe HD disks has higher "surface
- >density"). I even ran the diskettes through a magnet before formatting
- >them, but still no luck. Thanks!
- >
- >Jeric
- >
-
- The LD drive heads are larger then the HD heads. As a result the LD heads
- are reading more then one track at a time on the HD disk. Track 0 isn't
- bad, it's just smaller then the LD drive is capible of reading it.
-
- You can format the HD disks in the LD drive but you must either use virgin
- disks (aka. never been formatted as HD) or completely erase the treacks
- from the HD disk before formatting it in the LD drive.
-
- You may get away with using a real strong magnet, a disk erasing utility
- sush as bulkeras from copyiipc version 6 will definately do the trick.
- I've trashed disks before that had the "Track 0 Bad, Disk Unusable."
- when I tryed formatting them. Bulkeras fixed it up for reformatting again.
- --
- The Danimal @@@@- @@@@-
- @@@@@- @@@@- @@@@@- @@@@-
- UUCP: att!ihlpm!evans @@@@- @@@@@- @@@@- @@@@@-
- Internet: evans@ihlpm.att.com @@@@- @@@@-
-