From owner-freebsd-fs@FreeBSD.ORG  Wed Mar 25 04:54:39 2009
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Date: Wed, 25 Mar 2009 17:39:27 +1300
From: Mark Kirkwood <markir@paradise.net.nz>
In-reply-to: <49C99204.2050601@aldan.algebra.com>
To: "Mikhail T." <mi+thun@aldan.algebra.com>
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References: <49C83673.3000604@aldan.algebra.com> <49C98202.9040403@modulus.org>
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	<200903251232.11418.doconnor@gsoft.com.au>
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Cc: Daniel O'Connor <doconnor@gsoft.com.au>, freebsd-stable@freebsd.org,
	fs@freebsd.org
Subject: Re: dump | restore fails: unknown tape header type 1853384566
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Mikhail T. wrote:
>
> That said, I point out, that for me, dump is not failing (although it 
> did hang this morning). It is the restore, which fails to read dump's 
> output:
>
>    unknown tape header type 213474529
>    abort? [yn] n
>    resync restore, skipped 502 blocks
>    expected next file 54, got 0
>    unknown tape header type -954356454
>    abort? [yn] n
>    resync restore, skipped 29 blocks
>    expected next file 54, got 0
>    unknown tape header type -1754938223
>    abort? [yn] n
>    resync restore, skipped 482 blocks
>    expected next file 54, got 0
>    unknown tape header type -915868704
>    abort? [yn] n
>    resync restore, skipped 29 blocks
>    expected next file 54, got 0
>    unknown tape header type 1790084751
>    abort? [yn] n
>    resync restore, skipped 482 blocks
>    expected next file 54, got 0
>    unknown tape header type 903667267
>    abort? [yn] n
>    ...
>

Is this link any help?

http://www.mail-archive.com/freebsd-questions@freebsd.org/msg197899.html


Other than that, I'd suggest checking the disk(s) with smartmontools to 
try to rule out hardware problems.

regards

Mark