From nobody  Tue Feb 10 10:13:41 1998
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Date: Tue, 10 Feb 1998 10:13:41 -0800 (PST)
From: wefa@unicom.talkline.de
To: freebsd-gnats-submit@freebsd.org
Subject: CDROM Media Error triggers complete system lockup
X-Send-Pr-Version: www-1.0

>Number:         5703
>Category:       kern
>Synopsis:       CDROM Media Error triggers complete system lockup
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Feb 10 10:20:00 PST 1998
>Closed-Date:    Thu May 24 11:20:59 PDT 2001
>Last-Modified:  Thu May 24 11:21:23 PDT 2001
>Originator:     Christoph Weber-Fahr
>Release:        2.2.5-RELEAS
>Organization:
O.tel.o Communicoations
>Environment:
FreeBSD hektor.otelo-call.de 2.2.5-RELEASE FreeBSD 2.2.5-RELEASE #0: Thu Jan 29
     22:07:42 CET 1998     root@hektor.otelo-call.de:/usr/src/sys/compile/HEKTOR  i386
>Description:
Plain vanilla '486 System with aha1542, 2 1GB SCSI disks and a 
Toshiba 5201 SCSI CDROM. Trying to cp -R a part of the CDROM to
disk. (Only special is that the cdrom is accessed through a local
nfs (Re-)mount). After some time the CDROM encounters a Media Error:

"cd0(aha0:0:0): MEDIUM ERROR info:0x4a284 asc:15,0 Random positioning error"

After this the system solidly locks, though the kernel seems to 
continue working.
Some data points: 
I can...
- switch consoles
- scroll consoles (with scroll lock)
- open TCP connections to the system
- ping the system
- Even the Console Screen saver appears after some 
  time and disappears after pressing a key.
I can't
- enter any key into a shell on the console.
- log in on console (login doesn't react)
- log in via telnet (no login banner appears)
- deliver mail (no sendmail banner appears)
- ^Z or ^C the running cp process

This state remains - no timeouts occur within 
at least 10 Minutes.


>How-To-Repeat:
See above. Specifically, the problem _is_ repeatable here.
>Fix:

>Release-Note:
>Audit-Trail:

From: "Christoph Weber-Fahr" <wefa@callcenter.systemhaus.net>
To: freebsd-gnats-submit@freebsd.org
Cc:  Subject: Re: kern/5703 CDROM Media Error triggers complete system lockup
Date: Fri, 17 Apr 1998 01:02:29 +0200

 Hello,
 
 At 22 Mar 98 , 12:45 you wrote:
 
 > 	If you are still experiencing the problem you reported, it
 > would help the project track the problem if you could upgrade to the
 > latest snapshot of 2.2.6-Beta (located at releng22.freebsd.org) and
 > test your problem again. 
 
 Yes, the problem is still there.
 I tested it with 2.2.6-RELEASE, as found on releng22.freebsd.org.
 Since the machine it originally occurred on is currently in 
 production use, I tested it on a rather similar setup.
 
 The only differences were:
 - a Cyrix 486 processor
 - a IDE disk drive (but still a SCSI cdrom)
 - an Adaptec 1542B controller instead of the 1542C
 - a GENERIC kernel
 
 While testing I found some additional small data points:
 
 When using default nfs3 mount, the problem displays as originally
 described (complete system lock), no further reaction.
 When using nfs2 mode, I could provoke all kinds of fancy kernel 
 crashes - most of them 'page fault in kernel mode', but also other 
 panics.
 
 Regards
 
 Christoph Weber-Fahr
 __________________________________________________
 Christoph Weber-Fahr       wefa@unicom.talkline.de
 O.tel.o Communications GmbH
                                      06102 705-466
State-Changed-From-To: open->closed 
State-Changed-By: phk 
State-Changed-When: Thu May 24 11:20:59 PDT 2001 
State-Changed-Why:  
From:    "Joseph A. Mallett" <jmallett@xMach.org> 

PR 5703 (http://www.FreeBSD.org/cgi/query-pr.cgi?pr=5703) appears to not 
be relevant any longer, yet it is still listed as an "open" PR. I have 
attempted to duplicate this issue, and have not been able to. 
Additionally, the email address on the PR bounces, so I cannot find out if 
it still occurs for the submitter. 



http://www.FreeBSD.org/cgi/query-pr.cgi?pr=5703 
>Unformatted:
