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Date:      Wed, 21 Sep 2011 22:04:48 -0400
From:      Michael C Voorhis <mvoorhis@cs.wpi.edu>
To:        freebsd-questions@freebsd.org
Subject:   Reading DLT tapes with very large block sizes.
Message-ID:  <201109220204.p8M24mWo013345@cs.wpi.edu>

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Hi all,

I've been given a set of DLT tapes written with data in fixed 8Mb
blocks.  I have been unable to convince any OS to read these tapes,
and yet I need to read them.

Most tape drivers refuse to work with block sizes that are even a
fraction of this blocksize.  The tapes were created on a Linux machine
several years ago using the AMANDA tape backup system.

Can anyone offer davice on how I might go about reading these tapes.
I'm fine with patching code and installing an altered sa driver, but I
lack sufficient knowledge of how the scsi tape driver functions.  I'm
entirely willing and able to build a machine specifically to read
these tapes.

Any help, clues, guidance, etc would be wonderful.

Thanks,

	Mike Voorhis
	(mvoorhis@cs.wpi.edu)




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