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From: Julian Elischer <julian@ref.tfs.com>
Message-Id: <199512080733.XAA00834@ref.tfs.com>
Subject: Re: Problems with dump utility - again
To: siman@nbs.sk (miro siman)
Date: Thu, 7 Dec 1995 23:33:03 -0800 (PST)
Cc: questions@freebsd.org
In-Reply-To: <199512080715.IAA03743@chodovar.nbs.sk> from "miro siman" at Dec 8, 95 08:15:30 am
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This is not good
it indicates that either the firmware on your SCSIcard or one of the 
SCSI devices has lost it..
in fact we can say that aha1542 has "lost it" for certain..

If you can set some options to do with negotiation on the SCSI bus
then try that (there might be something to stop it from running at 10MB/sec)

also try slowing down the BUS accesses, (though that is a lot less likely)

julian
> 
>  Hello,
>  I've got some problems during dumping ( with /sbin/dump ) my
>  filesystems to SCSI 8mm tape drive. Here is my HW/SW config:
>  
>  	HW: 	HP Vectra N2 4/66 486 DX2 machine
>  		32MB RAM
>  		AHA-1540CF/1542CF with BIOS v2.01 SCSI adapter
>  		1 GB IBM DPES-31080 S31K SCSI disk
>  		EXABYTE EXB-8500SMBANXH1 0458 8mm SCSI tape drive
>  		WD SMC Ultra eth. card
>  
>  	SW:	FreeBSD 2.1.0-RELEASE
>  
>  	When dumping filesystems to tape drive with:
>  	
>  	/sbin/dump 0ubdf 32 105000 /dev/nrst0 /dev/sd0s2g       <-- /home
>  
>  OS hangs up with these err. messages on system console:
>  
>  	aha0: MBO 02 and not 00 (free)
>  	sd0(aha0:0:0): timed out
>  	adapter not taking command.. frozen?!
>  	Debugger ("aha1540") called
>  		AGAIN
>  
>  and dump utility writing these error messages:
>  	
>  	DUMP: Date of this level 0 dump: date is here
>  	DUMP; ....
>  	DUMP: Dumping /dev/rsd0s2g (/home) to /dev/rst0
>  	DUMP: mapping (Pass I) [regular files]
>  	DUMP: mapping (Pass II) [ directories]
>  	DUMP: estimated xxxxxxx tape blocks on 0,xx tape(s)
>  	DUMP: dumping (Pass III) [directories]
>  	DUMP: read error from /dev/rsd0s2g: Input/output error: \
>  	[sector 36592]: count=2048
>  
>  After these messages i'm forced to use HW reset to reboot system.
>  Any suggestions would be most appreciated
>  
>  				Thanks, miro
>  		
> -- 
> Miroslav Siman					
> National Bank of Slovakia			phone:	++42-7-513-3130
> Zahradnicka 153, P.O. Box 27			fax:	++42-7-526-5968
> 820 09 Bratislava				fax box:++42-7-513-6130
> Slovak Republic					Internet: siman@nbs.sk	
>