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- Newsgroups: comp.os.msdos.misc
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!att-out!cbfsb!cbnewsg.cb.att.com!rnichols
- From: rnichols@cbnewsg.cb.att.com (robert.k.nichols)
- Subject: Re: Formatting a 3.5" HD diskette to 720K - broken?
- Message-ID: <1992Nov18.034857.12543@cbfsb.cb.att.com>
- Summary: Don't mess with those media sensing holes!
- Sender: news@cbfsb.cb.att.com
- Organization: AT&T
- References: <9535@blue.cis.pitt.edu.UUCP> <92318.162808GNR100@psuvm.psu.edu> <1992Nov17.191809.18769@prism.poly.edu>
- Date: Wed, 18 Nov 1992 03:48:57 GMT
- Lines: 21
-
- In article <1992Nov17.191809.18769@prism.poly.edu> ssnyder@prism.poly.edu (Sharon Snyder) writes:
- >To format a 3.5 HD disk as DD (720k) cover up the extra hole (not
- >the write protect stuff) and format it as 720K (I forget the
- >command line right now). It should work.
- ...
-
- It will sort-of work. The problem is, the drive will be using the
- reduced write current suitable for the magnetic coating on a real DD
- diskette, and not the higher current required for reliable writing on
- the magnetically "harder" media of the HD diskette that you are using.
-
- (The disaster potential is not quite as insideous here as it is for
- people who try to get cheap HD disks by punching the extra hole. They
- have to contend with data that will decay away over time (6 months to a
- year, perhaps). Taping over the hole in a HD diskette will just cause
- somewhat marginal writes -- whatever data actually makes it onto the
- disk should be stable.)
-
- Bob Nichols
- AT&T Bell Laboratories
- rnichols@ihlpm.ih.att.com
-