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From: jbj@atmos.dar.csiro.au (JENSEN Jorgen)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: dd and partial blocks on tapes
Date: 22 Nov 1995 06:37:11 GMT
Organization: CSIRO DIT ( Melb. )
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Message-ID: <48ugen$iph@weever.mel.dit.csiro.au>
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On an ISC unix 4.1 system I generate a tape file by:
dd if=input_file bs=20b of=/dev/tape
where /dev/tape is a QIC-02 Viper 150 Mb drive.
On completion of the write, dd reports the whole+partial blocks.
I know that there is a partial block at the end of the tape volume.
When reading the tape of a FreeBSD 2.1 Dell laptop with Future Domain
SCSI port (sea0) I read the tape with:
dd if=/dev/rst0 bs=20b of=output_file
but now dd only lists the number of whole blockc + zero partial blocks.
What am I doing wrong, or is the Future Domain (sea0) driver faulty?
Many thanks, Jorgen B. Jensen