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Message-Id: <199610301911.LAA06403@black.jnx.com>
Date: Wed, 30 Oct 1996 11:11:56 -0800 (PST)
From: Tony Li <tli@jnx.com>
Reply-To: tli@jnx.com
To: FreeBSD-gnats-submit@freebsd.org
Subject: HP C1536A DAT drive errors
X-Send-Pr-Version: 3.2

>Number:         1929
>Category:       kern
>Synopsis:       HP C1536A DAT drive errors
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct 30 11:20:01 PST 1996
>Closed-Date:    Sat Feb 22 16:13:55 PST 1997
>Last-Modified:  Sat Feb 22 16:14:45 PST 1997
>Originator:     Tony Li
>Release:        FreeBSD 2.2-CURRENT i386
>Organization:
Juniper Networks, Inc.
>Environment:

HP C1536A SCSI DAT drive
Adaptec 2940 Ultra SCSI host adapter
multiple different tapes

>Description:

Since a recent kernel upgrade, the tape drive has consistently failed to
read either existing or newly written tapes.  SCSI errors:

st0(ahc0:3:0): ststart st0(ahc0:3:0): Open complete
st0(ahc0:3:0): 
ststrategy st0(ahc0:3:0): ststart st0(ahc0:3:0): scsi_cmd
st0(ahc0:3:0): scsi_done
st0(ahc0:3:0): calling private err_handler()
st0(ahc0:3:0): private err_handler() returned -1
st0(ahc0:3:0): MEDIUM ERROR info:8000 asc:11,0 Unrecovered read error

This occurs on multiple tapes so we have either a kernel problem or a drive
failure.  We don't have access to a second drive to eliminate the drive
failure case.  As this started coincident with a kernel change....

>How-To-Repeat:

Load any written tape (this takes too long).  Attempt to read the tape.  

>Fix:
>Release-Note:
>Audit-Trail:

From: "Justin T. Gibbs" <gibbs@freefall.freebsd.org>
To: tli@jnx.com
Cc: FreeBSD-gnats-submit@freebsd.org
Subject: Re: kern/1929: HP C1536A DAT drive errors 
Date: Wed, 30 Oct 1996 12:02:53 -0800

 >This occurs on multiple tapes so we have either a kernel problem or a drive
 >failure.  We don't have access to a second drive to eliminate the drive
 >failure case.  As this started coincident with a kernel change....
 
 The only thing that has changed recently is the aic7xxx driver, but
 I find it hard to believe that it would suddenly report media errors
 (a status indication returned from the drive) because of these changes.
 Why not boot the old kernel and see if your problem still occurs?  I
 think your drive needs to have its heads cleaned or to be sent in for
 service.
 --
 Justin T. Gibbs
 ===========================================
   FreeBSD: Turning PCs into workstations
 ===========================================

From: Tony Li <tli@jnx.com>
To: gibbs@freefall.freebsd.org
Cc: FreeBSD-gnats-submit@freebsd.org
Subject: Re: kern/1929: HP C1536A DAT drive errors
Date: Wed, 30 Oct 1996 12:15:06 -0800 (PST)

    >This occurs on multiple tapes so we have either a kernel problem or a drive
    >failure.  We don't have access to a second drive to eliminate the drive
    >failure case.  As this started coincident with a kernel change....
 
    The only thing that has changed recently is the aic7xxx driver, but
    I find it hard to believe that it would suddenly report media errors
    (a status indication returned from the drive) because of these changes.
    Why not boot the old kernel and see if your problem still occurs?  I
    think your drive needs to have its heads cleaned or to be sent in for
    service.
 
 We've cleaned the drive repeatedly, to no effect.  We would love to boot
 the old kernel, but (guess what?) it's on tape.  ;-)
 
 Tony
 
 

From: "Justin T. Gibbs" <gibbs@freefall.freebsd.org>
To: Tony Li <tli@jnx.com>
Cc: FreeBSD-gnats-submit@freebsd.org
Subject: Re: kern/1929: HP C1536A DAT drive errors 
Date: Wed, 30 Oct 1996 12:18:34 -0800

 >
 >   >This occurs on multiple tapes so we have either a kernel problem or a driv
 >e
 >   >failure.  We don't have access to a second drive to eliminate the drive
 >   >failure case.  As this started coincident with a kernel change....
 >
 >   The only thing that has changed recently is the aic7xxx driver, but
 >   I find it hard to believe that it would suddenly report media errors
 >   (a status indication returned from the drive) because of these changes.
 >   Why not boot the old kernel and see if your problem still occurs?  I
 >   think your drive needs to have its heads cleaned or to be sent in for
 >   service.
 >
 >We've cleaned the drive repeatedly, to no effect.  We would love to boot
 >the old kernel, but (guess what?) it's on tape.  ;-)
 >
 >Tony
 
 Boot a SNAP kernel.
 
 --
 Justin T. Gibbs
 ===========================================
   FreeBSD: Turning PCs into workstations
 ===========================================
State-Changed-From-To: open->closed 
State-Changed-By: mpp 
State-Changed-When: Sat Feb 22 16:13:55 PST 1997 
State-Changed-Why:  
The originator says that this turned out to be a hardware problem. 
>Unformatted:
Tony Li
