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From: buc@jessica.stanford.edu (Robert Richards)
Subject: [sun-spots] "copytape" makes exact duplicates of most tapes -- Newer version?
Message-ID: <1991Mar30.192740.8364@ox.com>
Followup-To: comp.sys.sun
Keywords: Source
Sender: emv@msen.com (Edward Vielmetti, MSEN)
Reply-To: buc@jessica.stanford.edu (Robert Richards)
Organization: Sun-Spots
References: <2064@brchh104.bnr.ca>
Date: Sat, 30 Mar 1991 19:27:40 GMT
Approved: emv@msen.com (Edward Vielmetti, MSEN)
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Archive-name: hardware/tapes/copytape/1991-03-22
Archive: ftp.acsu.buffalo.edu:/pub/copytape.tar [128.205.7.9]
Original-posting-by: buc@jessica.stanford.edu (Robert Richards)
Original-subject: "copytape" makes exact duplicates of most tapes -- Newer version?
Reposted-by: emv@msen.com (Edward Vielmetti, MSEN)

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 contain 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				
	Stanford University