NetBSD Problem Report #4645

Received: (qmail 16703 invoked from network); 6 Dec 1997 04:50:09 -0000
Message-Id: <199712060434.WAA01603@cynjut.neonramp.com>
Date: Fri, 5 Dec 1997 22:34:00 -0600 (CST)
From: Dave Burgess <burgess@cynjut.neonramp.com>
Reply-To: burgess@cynjut.neonramp.com
To: gnats-bugs@gnats.netbsd.org
Subject: Accessing tape drive causes controller lock-up.
X-Send-Pr-Version: 3.95

>Number:         4645
>Category:       kern
>Synopsis:       Accessing tape drive causes controller lock-up.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lukem
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Dec 05 21:05:02 +0000 1997
>Closed-Date:    Mon Jan 07 21:08:16 +0000 2002
>Last-Modified:  Mon May 21 01:26:18 +0000 2012
>Originator:     Dave Burgess
>Release:        1.3_BETA Dec 1 1997
>Organization:
Dave Burgess                   Network Engineer - Nebraska On-Ramp, Inc.
*bsd FAQ Maintainer / SysAdmin for the NetBSD system in my spare bedroom
"Just because something is stupid doesn't mean there isn't someone that 
doesn't want to do it...."
>Environment:

System: NetBSD cynjut.neonramp.com 1.3_BETA NetBSD 1.3_BETA (CYNJUT) #1: Mon Dec 1 12:32:08 CST 1997 burgess@cynjut.neonramp.com:/usr/src/sys/arch/i386/compile/CYNJUT i386


>Description:
	When the Archive QIC-525 tape drive is initially scanning the
	tape, any access to the drive causes my Ultrastore 34F
	controller to wedge unrecoverably.  Subsequent reboots will not
	clear the condition:  the error reported is "ccb not allocated".
	I noticed this earlier in the week and ascribed it to a bad
	cable.  I have since replaced the cable.  All of the other SCSI
	problems went away except for this one.  
>How-To-Repeat:
	Turn on the computer with a tape in the tape drive.  Escape out
	of the memory test and hit return on the boot selector.  The
	tape is still scanning for format at this point.  As soon as the
	Ultrastore controller scans the tape drive (which is ID-6), the
	machine will dump core to the IDE drive and reboot.  The
	subsequent reboot will have the Ultrastore controller either
	completely unrecognized (as in 'disappeared') or will error out
	at the first drive probe.  Another way to cause this is to put a
	tape in the tape drive and try and access it before the drive
	has settled.  I've even had it happen once when I Put in a CD
	and tried to access it before the drive was completely spun up.
	That was before I put in the new cable, though, so that may be
	an abheration.
>Fix:
	The only work-around I've found it "don't do that".  Let the
	tape drives and other SCSI devices settle before attacking them.
>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback 
State-Changed-By: lukem 
State-Changed-When: Sun Dec 23 19:38:08 PST 2001 
State-Changed-Why:  
Is this still a problem in NetBSD-current (with the updated scsipi stuff)? 


Responsible-Changed-From-To: kern-bug-people->lukem 
Responsible-Changed-By: lukem 
Responsible-Changed-When: Sun Dec 23 19:38:08 PST 2001 
Responsible-Changed-Why:  
State-Changed-From-To: feedback->closed 
State-Changed-By: fair 
State-Changed-When: Mon Jan 7 13:07:20 PST 2002 
State-Changed-Why:  
Submitter reports that the problem no longer occurrs under -current (1.5ZA). 

>Unformatted:

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