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From: "Jonathan M. Bresler" <jmb>
Message-Id: <199606171445.HAA22491@freefall.freebsd.org>
Subject: Re: bin/1320: dump limits blocksize to 32K
To: gwk@cray.com
Date: Mon, 17 Jun 1996 07:45:24 -0700 (PDT)
Cc: gpalmer@FreeBSD.ORG, freebsd-bugs@freefall.freebsd.org
In-Reply-To: <199606171323.PAA18629@racer.dkrz.de> from "Georg-W. Koltermann" at Jun 17, 96 03:23:30 pm
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Georg-W. Koltermann wrote:
> 
> >>>>> ""Gary" == "Gary Palmer" <gpalmer@FreeBSD.ORG> writes:
>     "Gary>  The following reply was made to PR bin/1320; it has been
>     "Gary> noted by GNATS.  From: "Gary Palmer" <gpalmer@FreeBSD.ORG>
>     "Gary> To: gena@netvision.net.il Cc:
>     "Gary> FreeBSD-gnats-submit@FreeBSD.ORG Subject: Re: bin/1320:
>     "Gary> dump limits blocksize to 32K Date: Thu, 13 Jun 1996
>     "Gary> 09:42:36 +0100
>     "Gary> 
>     "Gary>  gena@netvision.net.il wrote in message ID
>     "Gary> <199606130916.LAA16644@Burka.NetVision.net.il>:
>     >> All this may be true (?) for local backup , but absolutely not
>     >> when using rdump. I back up my system on DLT SCSI tape

	rdump(8) uses rexec(3) and passes the arguments to the remote
	host to execute.  so the "blocksize = 126" is done on the 
	remote solaris system (it will be needed for rrestore as well)

	rdump(8) should/must not try to interrept the arguments to the
	remote dump(8) command.

jmb

>     >> connected to Solaris system and tape's manuall says that
>     >> blocksize = 126 should be spcified.
>     "Gary>   Your patch is wrong for just that reason ... it is true
>     "Gary> for local backups, and removing the code which does the
>     "Gary> check is hence incorrect. It should only ignore the
>     "Gary> blocksize for non-local backups, not ignore it totally.
>     "Gary>  
>     "Gary>  Gary -- Gary Palmer FreeBSD Core Team Member FreeBSD:
>     "Gary> Turning PC's into workstations. See http://www.FreeBSD.ORG/
>     "Gary> for info
>     "Gary> 
> 
> I would prefer to get a warning from dump(8), not an error exit.
> There may be other cases to consider, in addition to dumping to a
> remote system with rdump(8).
> 
> E. g. how about dumping to a locally attached device with the
> intention of restoring the tape on another system?  The other system
> may very well be capable of handling blocksizes > 32.
> 
> Georg-W. Koltermann, gwk@cray.com
>