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Date:      Tue, 11 May 1999 16:28:51 +0200 (CEST)
From:      Wilko Bulte <wilko@yedi.iaf.nl>
To:        syssgm@detir.qld.gov.au (Stephen McKay)
Cc:        freebsd-scsi@FreeBSD.ORG, syssgm@detir.qld.gov.au, roberto@keltia.freenix.fr
Subject:   Re: problem with non-rewinding device on DLT / using dump ?
Message-ID:  <199905111428.QAA01469@yedi.iaf.nl>
In-Reply-To: <199905110806.SAA28834@nymph.detir.qld.gov.au> from Stephen McKay at "May 11, 1999  6: 6:50 pm"

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As Stephen McKay wrote ...
> On Sunday, 9th May 1999, Wilko Bulte wrote:
> 
> >As Ollivier Robert wrote ...
> >> According to Wilko Bulte:
> >> > make that: restore -s 3 -b64 -i -f /dev/nrsa2
> >> > 
> >> > and it works a whole lot better.
> >> 
> >> I thought restore(8) was supposed to find the blocksize itself... 
> >
> >Well... with -b64 I can restore things, without I can't. So I guess restore
> >can not do it.
> 
> It can guess as high as 32KB, but no higher.  Changing HIGHDENSITYTREC to
> 64 would cause dump to write in 64KB blocks for most devices and cause
> restore to guess as large as 64KB.
> 
> But, I think that some QIC tape devices will fail because 64KB blocks are
> illegal in some modes.  I find that 32KB works for me for all drive types
> that I use (QIC old and new, Exabyte 8200 thru 8505).  Any reason why
> you don't use 32KB?

DLTs stream better using bigger block sizes.

Groeten / Cheers,

|   / o / /  _  	 Arnhem, The Netherlands	- Powered by FreeBSD -
|/|/ / / /( (_) Bulte 	 WWW  : http://www.tcja.nl 	http://www.freebsd.org


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