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Date:      Wed, 06 Jun 2007 08:44:06 +0200
From:      Robin Gruyters <r.gruyters@yirdis.nl>
To:        Tim Kientzle <kientzle@freebsd.org>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: Unrecognized archive format with RELENG_6_2 and RELENG_6
Message-ID:  <20070606084406.8v6nkbtv9csgs880@server.yirdis.nl>
In-Reply-To: <46658EEB.5000008@freebsd.org>
References:  <20070601114047.z6qgi686os4ogw4o@server.yirdis.nl> <200706020852.21208.doconnor@gsoft.com.au> <20070604101603.f0ki85am800wso0k@server.yirdis.nl> <200706052131.44320.doconnor@gsoft.com.au> <46658EEB.5000008@freebsd.org>

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Quoting Tim Kientzle <kientzle@freebsd.org>:

>> On Monday 04 June 2007 17:46, Robin Gruyters wrote:
>>
>>> This morning I have revert libarchive (src/lib/libarchive) and tar
>>> (src/usr.bin/tar) back to RELENG_6_1 and surprisingly (or maybe not)
>>> it works fine now.
>>>
>>> Maybe tar doesn't use the -b option when listing the content? (-t)
>
> Could you please send me details of the problem
> you're having?
>
Ok, here a small setup.

I create a random file with roughly size of 5MB:
$ dd if=3D/dev/random of=3Darchive.dmp bs=3D1024 count=3D5120
5120+0 records in
5120+0 records out
5242880 bytes transferred in 0.174116 secs (30111397 bytes/sec)

Then a tar the file (with or without blocksize set) to tape:
$ sudo tar -cf /dev/sa0 archive.dmp
$

After that I try to read/list the tar from tape with tar -t:
$ sudo mt -f /dev/sa0 rewind
$ sudo tar -tf /dev/sa0
archive.dmp
tar: Unrecognized archive format: Inappropriate file type or format
$

I get strait away the "Unrecognized archive" message.

But when I extract the archive from tape, it works perfectly:
$ sudo tar -xvf /dev/sa0
x archive.dmp
$

I have tested this with libarchive and tar from RELENG_6 and RELENG_6_2.
No problems with libarchive and tar from RELENG_6_1.

If you need more (debug) info, let me know

Kind regards,

Robin Gruyters
Network and Security Engineer
Yirdis B.V.
I: http://yirdis.com
P: +31 (0)36 5300394
F: +31 (0)36 5489119




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