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Date: Sat, 22 Sep 2001 10:38:28 -0700 (PDT)
From: David Hedley <david@inty.net>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/30744: UDMA ICRC error results in kernel panic
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>Number:         30744
>Category:       kern
>Synopsis:       UDMA ICRC error results in kernel panic
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Sep 22 10:40:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     David Hedley
>Release:        4.4-RELEASE
>Organization:
Intelligent Network Technology Ltd
>Environment:
FreeBSD bill.inty.net 4.4-RELEASE FreeBSD 4.4-RELEASE #0: Sat Sep 22 17:55:10 BST 2001     david@garth.hq.inty.net:/usr/src/sys/compile/GENERIC  i386
>Description:

I use a Promise TX2/100 card. From /var/run/dmesg.boot:
ar0: 19458MB <ATA RAID1 array> [2480/255/63] subdisks:
  ad4: 19458MB <Maxtor 2B020H1> [39535/16/63] at ata2-master UDMA100
  ad6: 19458MB <Maxtor 2B020H1> [39535/16/63] at ata3-master UDMA100

When an UDMA ICRC error is printed, the kernel panics with 'integer divide fault'.
>How-To-Repeat:

Generate a UDMA ICRC error on a Promise TX2/100
>Fix:

Comment out the bit of diskerr() in ufs/ufs_disksubr.c that prints the (hp0 bn %d cn %d tn %d sn %d) bit (i.e. lines 367 to 384) - that's where the problem seems to lie...

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

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