Repetitive filesystem corruption

[John R. Shannon]

FreeBSD 5.1-RELEASE-p10
CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (2793.02-MHz 686-class CPU)
Single Seagate Cheetah SCSI 320 disk on LSI controller

I'm experiencing a problem on one computer with the filesystem corrupting 
repetitively; another system here with the same software configuration but 
older hardware is working fine. When the system shuts down, I get the 
message:

syncing disks, buffers remaining... 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
giving up on 2 buffers


If I reboot into single user mode and run fsck, it reports corruption most of 
the time. I have verified the media using the verify command in the SCSI 
controllers BIOS.

Any help would be appreciated. Dmesg output attached.


-- 

John R. Shannon
john at johnrshannon.com


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Waiting (max 60 seconds) for system process `vnlru' to stop...stopped
Waiting (max 60 seconds) for system process `bufdaemon' to stop...stopped
Waiting (max 60 seconds) for system process `syncer' to stop...timed out

syncing disks, buffers remaining... 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 
giving up on 2 buffers
Uptime: 2m32s
Terminate ACPI
Rebooting...
cpu_reset called on cpu#0
cpu_reset: Stopping other CPUs
Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD 5.1-RELEASE-p10 #0: Wed Oct  8 07:47:30 CDT 2003
    root at venus.sed.redstone.army.mil:/usr/obj/usr/src/sys/KERNEL
Preloaded elf kernel "/boot/kernel/kernel" at 0xc0789000.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc0789244.
Timecounter "i8254"  frequency 1193182 Hz
Timecounter "TSC"  frequency 2793015636 Hz
CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (2793.02-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf29  Stepping = 9
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Hyperthreading: 2 logical CPUs
real memory  = 1072889856 (1023 MB)
avail memory = 1034244096 (986 MB)
Programming 24 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): apic id:  0, version: 0x00050014, at 0xfee00000
 cpu1 (AP):  apic id:  1, version: 0x00050014, at 0xfee00000
 io0 (APIC): apic id:  2, version: 0x00178020, at 0xfec00000
Pentium Pro MTRR support enabled
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <INTEL  D875BZLK> on motherboard
pcibios: BIOS version 2.10
Using $PIR table, 11 entries at 0xc00f3310
acpi0: power button is handled as a fixed feature programming model.
Timecounter "ACPI-safe"  frequency 3579545 Hz
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
acpi_cpu0: <CPU> port 0x530-0x537 on acpi0
acpi_cpu1: <CPU> port 0x530-0x537 on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
IOAPIC #0 intpin 16 -> irq 2
IOAPIC #0 intpin 19 -> irq 16
IOAPIC #0 intpin 18 -> irq 17
IOAPIC #0 intpin 23 -> irq 18
IOAPIC #0 intpin 17 -> irq 19
agp0: <Intel Generic host to PCI bridge> mem 0xf8000000-0xfbffffff at device 0.0 on pci0
pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pci1: <display, VGA> at device 0.0 (no driver attached)
pcib2: <ACPI PCI-PCI bridge> at device 3.0 on pci0
pci2: <ACPI PCI bus> on pcib2
em0: <Intel(R) PRO/1000 Network Connection, Version - 1.5.31> port 0xac00-0xac1f mem 0xfe1e0000-0xfe1fffff irq 17 at device 1.0 on pci2
em0:  Speed:100 Mbps  Duplex:Full
uhci0: <Intel 82801EB (ICH5) USB controller USB-A> port 0xe000-0xe01f irq 2 at device 29.0 on pci0
usb0: <Intel 82801EB (ICH5) USB controller USB-A> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1: <Intel 82801EB (ICH5) USB controller USB-B> port 0xe400-0xe41f irq 16 at device 29.1 on pci0
usb1: <Intel 82801EB (ICH5) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801EB (ICH5) USB controller USB-C> port 0xe800-0xe81f irq 17 at device 29.2 on pci0
usb2: <Intel 82801EB (ICH5) USB controller USB-C> on uhci2
usb2: USB revision 1.0
uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
uhci3: <Intel 82801EB (ICH5) USB controller USB-D> port 0xec00-0xec1f irq 2 at device 29.3 on pci0
usb3: <Intel 82801EB (ICH5) USB controller USB-D> on uhci3
usb3: USB revision 1.0
uhub3: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub3: 2 ports with 2 removable, self powered
pci0: <serial bus, USB> at device 29.7 (no driver attached)
pcib3: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci3: <ACPI PCI bus> on pcib3
IOAPIC #0 intpin 21 -> irq 20
IOAPIC #0 intpin 22 -> irq 21
mpt0: <LSILogic 1030 Ultra4 Adapter> port 0xc800-0xc8ff mem 0xfeae0000-0xfeaeffff,0xfeaf0000-0xfeafffff irq 20 at device 0.0 on pci3
ahc0: <Adaptec 29160 Ultra160 SCSI adapter> port 0xc400-0xc4ff mem 0xfeadf000-0xfeadffff irq 21 at device 1.0 on pci3
aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
pcm0: <Creative CT5880-E> port 0xcc00-0xcc3f irq 16 at device 3.0 on pci3
pcm0: <SigmaTel STAC9708/11 AC97 Codec>
fxp0: <Intel 82557/8/9 EtherExpress Pro/100(B) Ethernet> port 0xc000-0xc03f mem 0xfea80000-0xfea9ffff,0xfeade000-0xfeadefff irq 17 at device 4.0 on pci3
fxp0: Ethernet address 00:02:b3:d7:13:f4
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
ichsmb0: <SMBus controller> port 0xdc00-0xdc1f irq 19 at device 31.3 on pci0
acpi_button0: <Sleep Button> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> port 0x3f7,0x3f4-0x3f5,0x3f2-0x3f3,0x3f0-0x3f1 irq 6 drq 2 on acpi0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
ppc0 port 0x378-0x37f irq 7 on acpi0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
orm0: <Option ROMs> at iomem 0xd4800-0xd57ff,0xd3000-0xd47ff,0xc0000-0xce7ff on isa0
pmtimer0 on isa0
ata0 at port 0x3f6,0x1f0-0x1f7 irq 14 on isa0
ata1 at port 0x376,0x170-0x177 irq 15 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
APIC_IO: Testing 8254 interrupt delivery
APIC_IO: routing 8254 via IOAPIC #0 intpin 2
Timecounters tick every 10.000 msec
IPsec: Initialized Security Association Processing.
Waiting 15 seconds for SCSI devices to settle
acpi_cpu: throttling enabled, 8 steps (100% to 12.5%), currently 100.0%
sa0 at ahc0 bus 0 target 5 lun 0
sa0: <BNCHMARK DLT1 5538> Removable Sequential Access SCSI-2 device 
sa0: 20.000MB/s transfers (10.000MHz, offset 15, 16bit)
SMP: AP CPU #1 Launched!
da0 at mpt0 bus 0 target 0 lun 0
da0: <SEAGATE ST318453LC 0005> Fixed Direct Access SCSI-3 device 
da0: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da0: 17501MB (35843686 512 byte sectors: 255H 63S/T 2231C)
cd0 at ahc0 bus 0 target 4 lun 0
cd0: <PLEXTOR CD-R   PX-W4012S 1.01> Removable CD-ROM SCSI-2 device 
cd0: 20.000MB/s transfers (20.000MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
Mounting root from ufs:/dev/da0s1a