From owner-freebsd-hardware  Sun May 24 07:57:14 1998
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Date: Sun, 24 May 1998 15:56:54 +0100
From: Karl Pielorz <kpielorz@tdx.co.uk>
Organization: TDX
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To: Dmitry Morozovsky <marck@rinet.ru>
CC: freebsd-hardware@FreeBSD.ORG
Subject: Re: dumping really big filesystems to Travan-4 streamer
References: <Pine.BSF.3.96.980524162513.24236E-100000@woozle.rinet.ru>
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Dmitry Morozovsky wrote:
> 
> Hello there.
> 
> 0. FreeBSD 2.2.6-R, ufs with 6G of used space, Travan-4 by Seagate (4G
> native size) SCSI tape, hardware compression on. Central thing: file system
> used size is more than 1 tape.
> dumping with command
> > dump -0ua -b 32 -f /dev/nrst0
> 
> leads to error message at the end of the first tape:
> 
>   DUMP: 57.24% done, finished in 1:40
>   DUMP: write error 3999584 blocks into volume 1
>   DUMP: Do you want to restart?: ("yes" or "no")
> 
> Then, answering "no" leads to abort entire dump; answer "yes" leads to
> remount tape and rewrite backup set from the very beginning, then to the
> same error message.
> 
> Any suggestions?

It sounds like it's not seeing the end of the tape - I've only got a
workaround for this (I've had similar problems in the past) - in the end I
had to turn compression off on the device, and tell dump the actual media
size... I'd also like to know a better 'fix' for this ;-)

Regards,

Karl Pielorz

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