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From: buc@jessica.stanford.edu (Robert Richards)
Newsgroups: comp.unix.admin
Subject: "copytape" makes exact duplicates of most tapes -- Newer version?
Message-ID: <1991Mar19.061406.6519@leland.Stanford.EDU>
Date: 19 Mar 91 06:14:06 GMT
Sender: news@leland.Stanford.EDU (Mr News)
Distribution: usa
Organization: Stanford University
Lines: 42


The program "copytape" makes exact duplicates of SUN 1/4" tapes and
DEC tapes and probably others.  This includes boot tapes.  Copytape is
available by anonymous ftp from,

	ftp.acsu.buffalo.edu                    ! in pub/copytape.tar
	titan.rice.edu

However, "copytape" fails on tapes that contains files whose record
size changes in a file.  For example, the following is a partial
listing of the output of tcopy on a SPARCstation of a tape that
"copytape" can not properly copy.

file 6: record 1: size 65536
file 6: record 2: size 9216
file 6: eof after 2 records: 74752 bytes
file 7: records 1 to 174: size 65536
file 7: record 175: size 57344
file 7: eof after 175 records: 11460608 bytes
file 8: records 1 to 42: size 65536
file 8: record 43: size 64512
file 8: records 44 to 50: size 65536
file 8: record 51: size 1536
file 8: eof after 51 records: 3277312 bytes
file 9: records 1 to 7: size 65536
file 9: record 8: size 6144
file 9: eof after 8 records: 464896 bytes


Copytape handles all the files properly except for file 8 which has
record 43 that has a record size different from all the other record
sizes.

Does anyone know of a modified "copytape" that can handle this
situation?

===============================================================================
        Rob Richards				
        Supercomputer & Workstation Support Staff
        AIR					
	Stanford University
===============================================================================