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Article #30414

Re: Mediach() function question

#30414
From: G.Onufer
Date: Thu, 04 Feb 1988 08:35
23 lines
1649 bytes
In article <8802021912.AA05940@ELI.CS.YALE.EDU>, fischer-michael@YALE.ARPA (Michael Fischer) writes:
> The idea is that a disk cannot be changed without the system noticing
> and checking the serial number.  If the disk is write protected,
> the boot sector will be read more often than necessary but otherwise
> no harm is done.  Too bad if you are unlucky enough to have two
> disks with the same id and you insert one right after the other.
> Gemdos will not notice that the disks have been changed and will
> happily clobber the second disk if you attempt to write on it since
> it will use cached FAT information from the first.  Note that this
> situation (of duplicate disk ids) will occur with certain copy
> programs that copy the entire disk, including the boot sector.  Avoid
> using them for making backups of ordinary data disks.
> 
> --Mike Fischer <fischer-michael@cs.yale.edu>
> -------
This will happen also if you have formatted your disks with the original
version of TWISTER.  It never changed the serial numbers on the disks!!

If you have the original, call a BBS and get the one called TWISTE.PRG 
(usually).  A patch is also to be found....

Greg Onufer
exodus@uop.edu
Technical Details
Message-ID: <1026@uop.edu>
Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!rutgers!sunybcs!bingvaxu!leah!uwmcsd1!ig!agate!ucbvax!ucdavis!uop!exodus
References: <8802021912.AA05940@ELI.CS.YALE.EDU>

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!rutgers!sunybcs!bingvaxu!leah!uwmcsd1!ig!agate!ucbvax!ucdavis!uop!exodus
From: exodus@uop.edu (G.Onufer)
Newsgroups: comp.sys.atari.st
Subject: Re: Mediach() function question
Message-ID: <1026@uop.edu>
Date: 4 Feb 88 08:35:27 GMT
References: <8802021912.AA05940@ELI.CS.YALE.EDU>
Organization: UoP-- Sun Lab Administration
Lines: 23
Summary: BEWARE:  Some fast-formatted disks will die too