NetBSD Problem Report #11066
Received: (qmail 5174 invoked from network); 22 Sep 2000 06:29:17 -0000
Message-Id: <20000922062911.E10E1F209@thoreau.thistledown.com.au>
Date: Fri, 22 Sep 2000 17:29:11 +1100 (EST)
From: Simon Burge <simonb@wasabisystems.com>
Sender: simonb@thistledown.com.au
Reply-To: Simon Burge <simonb@wasabisystems.com>
To: gnats-bugs@gnats.netbsd.org
Subject: machine check with IDE DMA restoring from ISA SCSI tape
X-Send-Pr-Version: 3.95
>Number: 11066
>Category: port-alpha
>Synopsis: machine check with IDE DMA restoring from ISA SCSI tape
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: thorpej
>State: closed
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Sep 22 06:30:00 +0000 2000
>Closed-Date: Tue Oct 13 15:36:58 +0000 2020
>Last-Modified: Tue Oct 13 15:36:58 +0000 2020
>Originator: Simon Burge
>Release: 1.5_ALPHA2
>Organization:
Wasabi Systems
>Environment:
System: NetBSD thoreau.thistledown.com.au 1.5_ALPHA2 NetBSD 1.5_ALPHA2 (THOREAU)
#12: Wed Sep 20 16:50:13 EST 2000
simonb@thoreau.thistledown.com.au:/data/00/obj/sys/arch/alpha/compile/THOREAU alpha
>Description:
I have an alpha PC164 with an IBM 46GB IDE disk, and an Exabyte
8500 connected to a (ISA) Adaptec 1542B. With ISA DMA enabled,
restoring approx 1.2GB of data from tape results in a machine
check, similar to:
mces = 0x1
vector = 0x660
param = 0xfffffc0000006060
pc = 0xfffffc0000300640
ra = 0xfffffc000036600c
curproc = 0x0
panic: machine check
The machine check has happened from 4 out of 4 attempts to
restore data, each within about 500kB of 1.2GB of data.
The PC and RA in the machine checks seem to be random. For one,
both the PC and RA were in pciide_dma_start, for another the
PC was in idle and the RA in mi_switch, and another the PC in
_pool_get and RA in wdc_get_xfer. I don't have the PC and RA
for the first machine check.
Disabling DMA on the IDE disks (using flags 0x0ff0) stops
the machine checks, as has switching to an NCR 53c810a SCSI
controller for the Exabyte and leaving DMA enabled.
>How-To-Repeat:
Restore approx 1.2GB of data from tape - works every time.
>Fix:
None given.
>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: port-alpha-maintainer->thorpej
Responsible-Changed-By: thorpej@NetBSD.org
Responsible-Changed-When: Tue, 13 Oct 2020 15:36:58 +0000
Responsible-Changed-Why:
Take.
State-Changed-From-To: open->closed
State-Changed-By: thorpej@NetBSD.org
State-Changed-When: Tue, 13 Oct 2020 15:36:58 +0000
State-Changed-Why:
Ancient PR, don't think we'll be getting to the bottom of this one.
>Unformatted:
(Contact us)
$NetBSD: gnats-precook-prs,v 1.4 2018/12/21 14:20:20 maya Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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