Repeatable kernel panic on -CURRENT using ZFS over SATA

[Pawel Jakub Dawidek]

On Tue, Oct 02, 2007 at 01:17:00AM -0700, Steven Schlansker wrote:
> Hello everyone,
> I recently set up a 6 drive SATA raidz2.  Whenever I try to use the 
> array, the dmesg fills up with warnings that WRITE_DMA must be retried 
> (repeatedly)
> 
> As soon as I remove the load, everything runs fine.
> 
> FreeBSD scotch.CSUA.Berkeley.EDU 7.0-CURRENT FreeBSD 7.0-CURRENT #0: Tue 
> Sep 25 21:37:14 PDT 2007 
> root at scotch.CSUA.Berkeley.EDU:/usr/obj/usr/src/sys/GENERIC  i386
> 
> 00:00.0 Host bridge: Intel Corporation 82840 840 (Carmel) Chipset Host 
> Bridge (Hub A) (rev 01)
> 00:01.0 PCI bridge: Intel Corporation 82840 840 (Carmel) Chipset AGP 
> Bridge (rev 01)
> 00:1e.0 PCI bridge: Intel Corporation 82801AA PCI Bridge (rev 02)
> 00:1f.0 ISA bridge: Intel Corporation 82801AA ISA Bridge (LPC) (rev 02)
> 00:1f.1 IDE interface: Intel Corporation 82801AA IDE (rev 02)
> 00:1f.2 USB Controller: Intel Corporation 82801AA USB (rev 02)
> 00:1f.3 SMBus: Intel Corporation 82801AA SMBus (rev 02)
> 01:00.0 VGA compatible controller: nVidia Corporation NV5 [RIVA 
> TNT2/TNT2 Pro] (rev 11)
> 02:04.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] 
> (rev 78)
> 02:06.0 Multimedia audio controller: Cirrus Logic CS 4614/22/24 
> [CrystalClear SoundFusion Audio Accelerator] (rev 01)
> 02:0e.0 PCI bridge: Digital Equipment Corporation DECchip 21152 (rev 03)
> 03:05.0 RAID bus controller: Silicon Image, Inc. SiI 3114 
> [SATALink/SATARaid] Serial ATA Controller (rev 02)
> 03:06.0 RAID bus controller: Silicon Image, Inc. SiI 3512 
> [SATALink/SATARaid] Serial ATA Controller (rev 01)
> 03:0a.0 SCSI storage controller: Adaptec AIC-7899P U160/m (rev 01)
> 03:0a.1 SCSI storage controller: Adaptec AIC-7899P U160/m (rev 01)
> 
> 
> 
> Dmesg with errors here:
> http://soda.csua.berkeley.edu/~steven/dmesg.txt
> 
> The eventual end result:
> http://soda.csua.berkeley.edu/~steven/Image053.jpg
> 
> 
> The only references I can find to similar problems were either not 
> resolved, or seemed to be related to a chipset which I am not using.
> 
> Is this a known issue?  How can I make this machine stable?  Is there 
> any more information I can provide to aid debugging?  Thanks so very much,

This looks like a problem a couple of folks already reported. For me it
looks like ATA bug, as if I recall correctly various controllers from
various vendors are affected. Unfortunately Soren isn't very active
lately. As a work-around you may try disabling write cache on your
disks (hw.ata.wc=0 to /boot/loader.conf), but this may only help to
mitigate the problem.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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