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Article #38

Wierd effect with COPY/DIFF

#38
From: Neil Readwin
Date: Mon, 27 Jul 1992 18:44
22 lines
1269 bytes
I did the following to a file (it was either an object library or an
shareable image and I cannot remember which):

	COPY foo.bar []
	DIFF foo.bar

DIFF told me that the files were different (I think it was a single 
block in a 30000 block file). I am at a loss to explain how this could
happen. Any suggestions?

BTW, this is a disk on which we run DISKEEPER and DISKEEPER keeps taking
ACCVIOs :-) when it goes near some files (like this one) that have 10 or 20
extension headers. ANAL/DISK shows no problems apart from the usual
collection of lost files and files marked for delete.

Finally, what is the use of the IDENT area in the extension header?
Does it matter that the name in the extension header is different to
that in the primary header? TIA, Neil.

-- 
 Phone: +44 71 528 8282  E-mail: nreadwin@micrognosis.co.uk
 Anything is a cause for sorrow that my mind or body has made
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Message-ID: <1992Jul27.184434.22381@micrognosis.co.uk>
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!uknet!miclon!nreadwin

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Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!uknet!miclon!nreadwin
From: nreadwin@micrognosis.co.uk (Neil Readwin)
Newsgroups: vmsnet.misc,comp.os.vms
Subject: Wierd effect with COPY/DIFF
Message-ID: <1992Jul27.184434.22381@micrognosis.co.uk>
Date: 27 Jul 92 18:44:34 GMT
Sender: news@micrognosis.co.uk (News account)
Organization: Micrognosis, London, UK.
Lines: 22