Xref: utzoo comp.unix.questions:10209 comp.unix.wizards:12397
Path: utzoo!yunexus!ists!mike
From: mike@ists (Mike Clarkson)
Newsgroups: comp.unix.questions,comp.unix.wizards
Subject: Re: Writing file containing NULL byte with 'dd' to a Exabyte Tape
Summary: RTFM, bs=2b
Keywords: exabyte,tape,errors
Message-ID: <254@ists>
Date: 14 Nov 88 07:15:11 GMT
Article-I.D.: ists.254
References: <558@gt-eedsp.UUCP>
Organization: Institute for Space and Terrestrial Science
Lines: 24

In article <558@gt-eedsp.UUCP>, jensen@gt-eedsp.UUCP (P. Allen Jensen) writes:
> I have been having a problem with an exabyte tape on a Multiflow/Trace
> system.  When writing a binary file which contains bytes whose value
> is NULL, I get a tape-write error.
> 
>           dd if=binary.data of=/dev/rmt5
> 
> Is this because of the representation of EOF or a bug of some kind ?
> Tar and dump work fine, cp has the same problem as dd.

The exabyte uses 1024 byte fixed blocks.

Is your dd defaulting to an odd number of 512 blocks?


Try specifying bs=2b or some such incantation.

Mike.

-- 
Mike Clarkson					mike@ists.UUCP
Institute for Space and Terrestrial Science	mike@ists.yorku.ca
York University, North York, Ontario,		uunet!mnetor!yunexus!ists!mike
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