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- Newsgroups: comp.sys.ibm.pc.misc
- Path: sparky!uunet!spool.mu.edu!agate!ames!pacbell.com!att-out!cbfsb!cbnewsg.cb.att.com!rnichols
- From: rnichols@cbnewsg.cb.att.com (robert.k.nichols)
- Subject: Re: Is FDFORMAT OK? (Was: double to high density diskette convert??)
- Message-ID: <1992Dec12.013225.13595@cbfsb.cb.att.com>
- Sender: news@cbfsb.cb.att.com
- Organization: AT&T
- References: <1992Dec8.145201.61800@cc.usu.edu> <1992Dec11.204253.26900@cs.mcgill.ca>
- Date: Sat, 12 Dec 1992 01:32:25 GMT
- Lines: 25
-
- In article <1992Dec11.204253.26900@cs.mcgill.ca> spader@statler.cs.mcgill.ca (Yoo-Shin LEE) writes:
- >I'd also like to know about programs such as FDformat which allow you
- >to format for 2 mbs on a hd disk. Are they safe and reliable?
- >I have a friend who used to always fdformat(2meg) his disks and use the
- >double hole punch routine. His 1.44 meg drive is screwed now and doesn't
- >copy reliably. I think it is because of his abuse of the above methods.
- ...
-
- FDFORMAT is OK. It still records are the rated bit density of the
- media. It really doesn't have much choice, since the hardware enforces
- the transfer rate based on the media type. There is one potential
- danger for 5.25" drives only. In a 5.25" HD drive, FDFORMAT can put 80
- tracks on a 360K disk that would normally have only 40 tracks. If you
- try to access such a disk without the FDREAD TSR loaded, you can bang
- the seek mechanism against the stop, since the controller will be set
- up to double-step to accommodate the standard 360K disk format.
-
- As for punching a hole to convert 3.5" DD disks to HD, that will cause
- data to be recorded unreliably, but it shouldn't hurt the drive unless
- plastic debris was left inside the shell (from drilling, rather than
- punching, the hole).
-
- Bob Nichols
- AT&T Bell Laboratories
- rnichols@ihlpm.ih.att.com
-