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Date:      Tue, 30 Mar 1999 00:29:39 -0500
From:      tjohnson@wallace.dlib.vt.edu
To:        FreeBSD-gnats-submit@freebsd.org
Subject:   kern/10866: ahc2740 panic
Message-ID:  <199903300529.AA32266@wallace.dlib.vt.edu>

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>Number:         10866
>Category:       kern
>Synopsis:       ahc2740 panic
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Mar 29 23:30:01 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     Tommy Johnson
>Release:        FreeBSD 3.1-STABLE i386
>Organization:
home machine
>Environment:

Dual Pentium, with Adaptec 2740 EISA SCSI controler.
Executing 3.1-STABLE, as of approx march 27.

>Description:

The system panics a short time after boot.

The debugger reports:  (retyped)
panic ahc0 brkadrint, Illegal Sequencer Address referenced at seqaddr 0x1e
mp_lock=01000001 cpuid=1  lapic.id=01000000
stopped at Debugger+0x37: movl $0,in_Debugger

the controler is:
Mar 27 11:25:11 teryx /kernel: Probing for devices on the EISA bus
Mar 27 11:25:11 teryx /kernel: ahc0: <Adaptec 274X SCSI host adapter> at 0x1c00-
0x1cff irq 14 on eisa0 slot 1
Mar 27 11:25:11 teryx /kernel: ahc0: aic7770 <= Rev C, Twin Chann
Mar 27 11:25:11 teryx /kernel: el, A SCSI Id=7, B SCSI Id=7, primary A, 4/255 SC
Bs

>How-To-Repeat:

It happens eventualy, within an hour of boot, I didn't have any specific
IO event occuring just before it.  Or any IO at all on the devices on that 
controler.


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


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