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From: srg@cunixd.cc.columbia.edu (Steven R Gerber)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Is there anyway to know a disk has been copied?
Message-ID: <1990Apr14.174605.18601@cunixf.cc.columbia.edu>
Date: 14 Apr 90 17:46:05 GMT
References: <2885@milton.acs.washington.edu> <3133@umbc3.UMBC.EDU>
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Reply-To: srg@cunixd.cc.columbia.edu (Steven R Gerber)
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Organization: Columbia University
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In article <3133@umbc3.UMBC.EDU> cs472309@umbc5.umbc.edu.UUCP (CMSC 472/03011) writes:
>In article <2885@milton.acs.washington.edu> jimli@milton.acs.washington.edu (Jimmy Li) writes:
>>I'd like to know if there is any way to know if a floppy disk has been copied.
>>It doesn't seem to be possible to me. But a friend of mine insists that it
>>could be done. 
>>
>>Any ideas?
>>-Jimmy.
>
>If you are copying from one floppy to another and they are both the
>same type (double density, high density, etc.), the DOS command
>DISKCOMP x: y: will compare the contents of two floppies, where you
>would substitute the actual drive letters for x and y.  You could
>compare the original floppy to the copy and verify the copy that way.
>
>  Mike Reese -- University of Maryland Baltimore County
>
>  Please send mail to:  ARPANET - MZR@DETRICK-HSC.ARMY.MIL (26.6.0.54)
>                                  REESEM@ILCN-DETRICK.ARPA (26.5.0.54)

Mike, I don't think that's what Jimmy is talking about.
I think he means "Taking any given (single) diskette, can you determine
whether or not a copy has been made of it?".
My answer: NO.

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