kern/117421: System hang with failing SATA disk (SiI3114)

Nate Eldredge neldredge at ucsd.edu
Tue Oct 23 04:00:05 PDT 2007


>Number:         117421
>Category:       kern
>Synopsis:       System hang with failing SATA disk (SiI3114)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Oct 23 11:00:04 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator:     Nate Eldredge
>Release:        6.2-RELEASE-p7
>Organization:
>Environment:
FreeBSD vulcan.lan 6.2-RELEASE-p7 FreeBSD 6.2-RELEASE-p7 #13: Mon Oct 22 23:36:32 PDT 2007     nate at vulcan.lan:/usr/obj/usr/src/sys/VULCAN  amd64

>Description:
One of the SATA disks (ad4) in my amd64 system is dying and has some bad sectors.  Previously the result of trying to read those sectors was a timeout error message and a panic due to PR 107639.  Now the result is a total hang.  When on the console in single user mode, numlock doesn't work, and I can't enter the debugger with ctrl-alt-esc (which normally works).  The software watchdog also can't rouse the system.

The odd thing is that the hang is accompanied by the console scrolling up one line (as if someone printf'ed a newline) and the block cursor disappears.  No other messages.

I don't know why the behavior changed.  It is possibly the result of adding a second disk (ad6, also SATA) as a replacement for the failing one.

I tried setting a ddb breakpoint on printf to see if that was the reason for the newline.  The result of that was that instead of a newline, a '[' was printed, in bright white, which is the first character of the debugger's breakpoint message ("[thread pid %d tid %ld ]" from db_print_thread).

This is not an inherent hardware problem because Linux (Knoppix 5.1.1) is able to read the disk without crashing.  (It reports I/O errors, of course.)

Obviously I'm going to get rid of the broken disk eventually, but I'd like to help fix this bug before I do.  Any suggestions welcome.

Here is a verbose dmesg output:

cam: using minimum scsi_delay (100ms)
Copyright (c) 1992-2007 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 is a registered trademark of The FreeBSD Foundation.
FreeBSD 6.2-RELEASE-p7 #13: Mon Oct 22 23:36:32 PDT 2007
    nate at vulcan.lan:/usr/obj/usr/src/sys/VULCAN
Preloaded elf kernel "/boot/kernel/kernel" at 0xffffffff80734000.
Preloaded elf obj module "/boot/kernel/snd_ich.ko" at 0xffffffff80734198.
Preloaded elf obj module "/boot/kernel/sound.ko" at 0xffffffff80734740.
Calibrating clock(s) ... i8254 clock: 1192963 Hz
CLK_USE_I8254_CALIBRATION not specified - using default frequency
Timecounter "i8254" frequency 1193182 Hz quality 0
Calibrating TSC clock ... TSC clock: 1790360410 Hz
CPU: AMD Opteron(tm) Processor 244 (1790.36-MHz K8-class CPU)
  Origin = "AuthenticAMD"  Id = 0xf5a  Stepping = 10
  Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
  AMD Features=0xe0500800<SYSCALL,NX,MMX+,LM,3DNow+,3DNow>
L1 2MB data TLB: 8 entries, fully associative
L1 2MB instruction TLB: 8 entries, fully associative
L1 4KB data TLB: 32 entries, fully associative
L1 4KB instruction TLB: 32 entries, fully associative
L1 data cache: 64 kbytes, 64 bytes/line, 1 lines/tag, 2-way associative
L1 instruction cache: 64 kbytes, 64 bytes/line, 1 lines/tag, 2-way associative
L2 2MB unified TLB: 0 entries, disabled/not present
L2 4KB data TLB: 512 entries, 4-way associative
L2 4KB instruction TLB: 512 entries, 4-way associative
L2 unified cache: 1024 kbytes, 64 bytes/line, 1 lines/tag, 16-way associative
real memory  = 1073676288 (1023 MB)
Physical memory chunk(s):
0x0000000000001000 - 0x000000000009efff, 647168 bytes (158 pages)
0x0000000000831000 - 0x000000003e1a7fff, 1033334784 bytes (252279 pages)
avail memory = 1027506176 (979 MB)
mem: <memory>
null: <null device, zero device>
random: <entropy source, Software, Yarrow>
io: <I/O>
nfslock: pseudo-device
cpu0 on motherboard
pci_open(1):	mode 1 addr port (0x0cf8) is 0x80010014
pci_open(1a):	mode1res=0x80000000 (0x80000000)
pci_cfgcheck:	device 0 [class=060000] [hdr=00] is there (id=74541022)
pcib0: <Host to PCI bridge> pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
pci0: physical bus=0
found->	vendor=0x1022, dev=0x7454, revid=0x14
	bus=0, slot=0, func=0
	class=06-00-00, hdrtype=0x00, mfdev=0
	cmdreg=0x0006, statreg=0x0210, cachelnsz=0 (dwords)
	lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	map[10]: type 3, range 32, base f0000000, size 27, enabled
found->	vendor=0x1022, dev=0x7455, revid=0x14
	bus=0, slot=1, func=0
	class=06-04-00, hdrtype=0x01, mfdev=0
	cmdreg=0x0107, statreg=0x0220, cachelnsz=0 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x08 (2000 ns), maxlat=0x00 (0 ns)
found->	vendor=0x1022, dev=0x7460, revid=0x07
	bus=0, slot=6, func=0
	class=06-04-00, hdrtype=0x01, mfdev=0
	cmdreg=0x0117, statreg=0x0230, cachelnsz=0 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x06 (1500 ns), maxlat=0x04 (1000 ns)
found->	vendor=0x1022, dev=0x7468, revid=0x05
	bus=0, slot=7, func=0
	class=06-01-00, hdrtype=0x00, mfdev=1
	cmdreg=0x000f, statreg=0x0220, cachelnsz=0 (dwords)
	lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
found->	vendor=0x1022, dev=0x7469, revid=0x03
	bus=0, slot=7, func=1
	class=01-01-8a, hdrtype=0x00, mfdev=0
	cmdreg=0x0005, statreg=0x0200, cachelnsz=0 (dwords)
	lattimer=0x20 (960 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	map[20]: type 4, range 32, base 0000ffa0, size  4, enabled
found->	vendor=0x1022, dev=0x746a, revid=0x02
	bus=0, slot=7, func=2
	class=0c-05-00, hdrtype=0x00, mfdev=0
	cmdreg=0x0001, statreg=0x0200, cachelnsz=0 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	intpin=d, irq=10
	map[10]: type 4, range 32, base 0000c480, size  5, enabled
found->	vendor=0x1022, dev=0x746b, revid=0x05
	bus=0, slot=7, func=3
	class=06-80-00, hdrtype=0x00, mfdev=0
	cmdreg=0x0000, statreg=0x0280, cachelnsz=0 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
found->	vendor=0x1022, dev=0x746d, revid=0x03
	bus=0, slot=7, func=5
	class=04-01-00, hdrtype=0x00, mfdev=0
	cmdreg=0x0005, statreg=0x0200, cachelnsz=0 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	intpin=b, irq=9
	map[10]: type 4, range 32, base 0000c800, size  8, enabled
	map[14]: type 4, range 32, base 0000cc00, size  6, enabled
found->	vendor=0x1022, dev=0x1100, revid=0x00
	bus=0, slot=24, func=0
	class=06-00-00, hdrtype=0x00, mfdev=1
	cmdreg=0x0000, statreg=0x0010, cachelnsz=0 (dwords)
	lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
found->	vendor=0x1022, dev=0x1101, revid=0x00
	bus=0, slot=24, func=1
	class=06-00-00, hdrtype=0x00, mfdev=1
	cmdreg=0x0000, statreg=0x0000, cachelnsz=0 (dwords)
	lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
found->	vendor=0x1022, dev=0x1102, revid=0x00
	bus=0, slot=24, func=2
	class=06-00-00, hdrtype=0x00, mfdev=1
	cmdreg=0x0000, statreg=0x0000, cachelnsz=0 (dwords)
	lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
found->	vendor=0x1022, dev=0x1103, revid=0x00
	bus=0, slot=24, func=3
	class=06-00-00, hdrtype=0x00, mfdev=1
	cmdreg=0x0000, statreg=0x0000, cachelnsz=0 (dwords)
	lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
agp0: <AMD 8151 AGP graphics tunnel> mem 0xf0000000-0xf7ffffff at device 0.0 on pci0
agp0: 1 Miscellaneous Control unit(s) found.
agp0: Aperture Base[0]: 0x00000078
agp0: Reserved 0x8000000 bytes for rid 0x10 type 3 at 0xf0000000
agp0: allocating GATT for aperture of size 128M
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pcib1:   secondary bus     1
pcib1:   subordinate bus   1
pcib1:   I/O decode        0x7000-0x9fff
pcib1:   memory decode     0xff300000-0xff3fffff
pcib1:   prefetched decode 0xceb00000-0xeeafffff
pci1: <PCI bus> on pcib1
pci1: physical bus=1
found->	vendor=0x1002, dev=0x5960, revid=0x01
	bus=1, slot=0, func=0
	class=03-00-00, hdrtype=0x00, mfdev=1
	cmdreg=0x0107, statreg=0x02b0, cachelnsz=16 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x08 (2000 ns), maxlat=0x00 (0 ns)
	intpin=a, irq=11
	powerspec 2  supports D0 D1 D2 D3  current D0
	map[10]: type 3, range 32, base e0000000, size 27, enabled
pcib1: (null) requested memory range 0xe0000000-0xe7ffffff: good
	map[14]: type 4, range 32, base 00009000, size  8, enabled
pcib1: (null) requested I/O range 0x9000-0x90ff: in range
	map[18]: type 1, range 32, base ff3f0000, size 16, enabled
pcib1: (null) requested memory range 0xff3f0000-0xff3fffff: good
found->	vendor=0x1002, dev=0x5940, revid=0x01
	bus=1, slot=0, func=1
	class=03-80-00, hdrtype=0x00, mfdev=0
	cmdreg=0x0007, statreg=0x02b0, cachelnsz=16 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x08 (2000 ns), maxlat=0x00 (0 ns)
	powerspec 2  supports D0 D1 D2 D3  current D0
	map[10]: type 3, range 32, base d8000000, size 27, enabled
pcib1: (null) requested memory range 0xd8000000-0xdfffffff: good
	map[14]: type 1, range 32, base ff3e0000, size 16, enabled
pcib1: (null) requested memory range 0xff3e0000-0xff3effff: good
pci1: <display, VGA> at device 0.0 (no driver attached)
pci1: <display> at device 0.1 (no driver attached)
pcib2: <PCI-PCI bridge> at device 6.0 on pci0
pcib2:   secondary bus     2
pcib2:   subordinate bus   2
pcib2:   I/O decode        0xa000-0xbfff
pcib2:   memory decode     0xff400000-0xff5fffff
pcib2:   prefetched decode 0xfff00000-0xfffff
pci2: <PCI bus> on pcib2
pci2: physical bus=2
found->	vendor=0x1022, dev=0x7464, revid=0x0b
	bus=2, slot=0, func=0
	class=0c-03-10, hdrtype=0x00, mfdev=1
	cmdreg=0x0117, statreg=0x0280, cachelnsz=0 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x50 (20000 ns)
	intpin=d, irq=10
	map[10]: type 1, range 32, base ff5fd000, size 12, enabled
pcib2: (null) requested memory range 0xff5fd000-0xff5fdfff: good
found->	vendor=0x1022, dev=0x7464, revid=0x0b
	bus=2, slot=0, func=1
	class=0c-03-10, hdrtype=0x00, mfdev=0
	cmdreg=0x0117, statreg=0x0280, cachelnsz=0 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x50 (20000 ns)
	intpin=d, irq=10
	map[10]: type 1, range 32, base ff5fe000, size 12, enabled
pcib2: (null) requested memory range 0xff5fe000-0xff5fefff: good
found->	vendor=0x8086, dev=0x1076, revid=0x00
	bus=2, slot=3, func=0
	class=02-00-00, hdrtype=0x00, mfdev=0
	cmdreg=0x0117, statreg=0x0230, cachelnsz=16 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0xff (63750 ns), maxlat=0x00 (0 ns)
	intpin=a, irq=5
	powerspec 2  supports D0 D3  current D0
	map[10]: type 1, range 32, base ff5c0000, size 17, enabled
pcib2: (null) requested memory range 0xff5c0000-0xff5dffff: good
	map[14]: type 1, range 32, base ff5a0000, size 17, enabled
pcib2: (null) requested memory range 0xff5a0000-0xff5bffff: good
	map[18]: type 4, range 32, base 0000a880, size  6, enabled
pcib2: (null) requested I/O range 0xa880-0xa8bf: in range
found->	vendor=0x1095, dev=0x3114, revid=0x02
	bus=2, slot=5, func=0
	class=01-80-00, hdrtype=0x00, mfdev=0
	cmdreg=0x0107, statreg=0x02b0, cachelnsz=16 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	intpin=a, irq=10
	powerspec 2  supports D0 D1 D2 D3  current D0
	map[10]: type 4, range 32, base 0000bc00, size  3, enabled
pcib2: (null) requested I/O range 0xbc00-0xbc07: in range
	map[14]: type 4, range 32, base 0000b880, size  2, enabled
pcib2: (null) requested I/O range 0xb880-0xb883: in range
	map[18]: type 4, range 32, base 0000b800, size  3, enabled
pcib2: (null) requested I/O range 0xb800-0xb807: in range
	map[1c]: type 4, range 32, base 0000b480, size  2, enabled
pcib2: (null) requested I/O range 0xb480-0xb483: in range
	map[20]: type 4, range 32, base 0000b400, size  4, enabled
pcib2: (null) requested I/O range 0xb400-0xb40f: in range
	map[24]: type 1, range 32, base ff5ffc00, size 10, enabled
pcib2: (null) requested memory range 0xff5ffc00-0xff5fffff: good
found->	vendor=0x1106, dev=0x3044, revid=0x80
	bus=2, slot=10, func=0
	class=0c-00-10, hdrtype=0x00, mfdev=0
	cmdreg=0x0117, statreg=0x0210, cachelnsz=16 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x20 (8000 ns)
	intpin=a, irq=9
	powerspec 2  supports D0 D2 D3  current D0
	map[10]: type 1, range 32, base ff5ff000, size 11, enabled
pcib2: (null) requested memory range 0xff5ff000-0xff5ff7ff: good
	map[14]: type 4, range 32, base 0000ac00, size  7, enabled
pcib2: (null) requested I/O range 0xac00-0xac7f: in range
found->	vendor=0x1106, dev=0x3038, revid=0x61
	bus=2, slot=11, func=0
	class=0c-03-00, hdrtype=0x00, mfdev=1
	cmdreg=0x0117, statreg=0x0210, cachelnsz=16 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	intpin=a, irq=9
	powerspec 2  supports D0 D1 D2 D3  current D0
	map[20]: type 4, range 32, base 0000b000, size  5, enabled
pcib2: (null) requested I/O range 0xb000-0xb01f: in range
found->	vendor=0x1106, dev=0x3038, revid=0x61
	bus=2, slot=11, func=1
	class=0c-03-00, hdrtype=0x00, mfdev=1
	cmdreg=0x0117, statreg=0x0210, cachelnsz=16 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	intpin=b, irq=5
	powerspec 2  supports D0 D1 D2 D3  current D0
	map[20]: type 4, range 32, base 0000b080, size  5, enabled
pcib2: (null) requested I/O range 0xb080-0xb09f: in range
found->	vendor=0x1106, dev=0x3104, revid=0x63
	bus=2, slot=11, func=2
	class=0c-03-20, hdrtype=0x00, mfdev=1
	cmdreg=0x0117, statreg=0x0210, cachelnsz=16 (dwords)
	lattimer=0x40 (1920 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
	intpin=c, irq=10
	powerspec 2  supports D0 D1 D2 D3  current D0
	map[10]: type 1, range 32, base ff5ff800, size  8, enabled
pcib2: (null) requested memory range 0xff5ff800-0xff5ff8ff: good
ohci0: <OHCI (generic) USB controller> mem 0xff5fd000-0xff5fdfff irq 10 at device 0.0 on pci2
ohci0: Reserved 0x1000 bytes for rid 0x10 type 3 at 0xff5fd000
ohci0: [GIANT-LOCKED]
usb0: OHCI version 1.0, legacy support
usb0: SMM does not respond, resetting
usb0: <OHCI (generic) USB controller> on ohci0
usb0: USB revision 1.0
uhub0: AMD OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 3 ports with 3 removable, self powered
ohci1: <OHCI (generic) USB controller> mem 0xff5fe000-0xff5fefff irq 10 at device 0.1 on pci2
ohci1: Reserved 0x1000 bytes for rid 0x10 type 3 at 0xff5fe000
ohci1: [GIANT-LOCKED]
usb1: OHCI version 1.0, legacy support
usb1: SMM does not respond, resetting
usb1: <OHCI (generic) USB controller> on ohci1
usb1: USB revision 1.0
uhub1: AMD OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 3 ports with 3 removable, self powered
em0: <Intel(R) PRO/1000 Network Connection Version - 6.2.9> port 0xa880-0xa8bf mem 0xff5c0000-0xff5dffff,0xff5a0000-0xff5bffff irq 5 at device 3.0 on pci2
em0: Reserved 0x20000 bytes for rid 0x10 type 3 at 0xff5c0000
em0: Reserved 0x40 bytes for rid 0x18 type 4 at 0xa880
em0: bpf attached
em0: Ethernet address: 00:e0:81:31:ae:1d
em0: [MPSAFE]
atapci0: <SiI 3114 SATA150 controller> port 0xbc00-0xbc07,0xb880-0xb883,0xb800-0xb807,0xb480-0xb483,0xb400-0xb40f mem 0xff5ffc00-0xff5fffff irq 10 at device 5.0 on pci2
atapci0: Reserved 0x10 bytes for rid 0x20 type 4 at 0xb400
atapci0: [MPSAFE]
atapci0: Reserved 0x400 bytes for rid 0x24 type 3 at 0xff5ffc00
ata2: <ATA channel 0> on atapci0
ata2: SATA connect ready time=30ms
ata2: sata_connect devices=0x1<ATA_MASTER>
ata2: [MPSAFE]
ata3: <ATA channel 1> on atapci0
ata3: SATA connect ready time=20ms
ata3: sata_connect devices=0x1<ATA_MASTER>
ata3: [MPSAFE]
ata4: <ATA channel 2> on atapci0
ata4: SATA connect status=00000000
ata4: [MPSAFE]
ata5: <ATA channel 3> on atapci0
ata5: SATA connect status=00000000
ata5: [MPSAFE]
fwohci0: <VIA Fire II (VT6306)> port 0xac00-0xac7f mem 0xff5ff000-0xff5ff7ff irq 9 at device 10.0 on pci2
fwohci0: Reserved 0x800 bytes for rid 0x10 type 3 at 0xff5ff000
fwohci0: [MPSAFE]
fwohci0: OHCI version 1.0 (ROM=1)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:e0:81:00:00:30:79:00
fwohci0: Phy 1394a available S400, 2 ports.
fwohci0: Link S400, max_rec 2048 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
sbp0: <SBP-2/SCSI over FireWire> on firewire0
fwohci0: Initiate bus reset
fwohci0: node_id=0xc800ffc0, gen=1, CYCLEMASTER mode
firewire0: 1 nodes, maxhop <= 0, cable IRM = 0 (me)
firewire0: bus manager 0 (me)
pci2: <serial bus, USB> at device 11.0 (no driver attached)
pci2: <serial bus, USB> at device 11.1 (no driver attached)
ehci0: <VIA VT6202 USB 2.0 controller> mem 0xff5ff800-0xff5ff8ff irq 10 at device 11.2 on pci2
ehci0: Reserved 0x100 bytes for rid 0x10 type 3 at 0xff5ff800
ehci0: [GIANT-LOCKED]
ehci0: Dropped interrupts workaround enabled
usb2: EHCI version 1.0
usb2: wrong number of companions (2 != 0)
usb2: <VIA VT6202 USB 2.0 controller> on ehci0
usb2: USB revision 2.0
uhub2: VIA EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub2: 4 ports with 4 removable, self powered
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci1: <AMD 8111 UDMA133 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xffa0-0xffaf at device 7.1 on pci0
atapci1: Reserved 0x10 bytes for rid 0x20 type 4 at 0xffa0
ata0: <ATA channel 0> on atapci1
atapci1: Reserved 0x8 bytes for rid 0x10 type 4 at 0x1f0
atapci1: Reserved 0x1 bytes for rid 0x14 type 4 at 0x3f6
ata0: reset tp1 mask=03 ostat0=50 ostat1=01
ata0: stat0=0x10 err=0x01 lsb=0x14 msb=0xeb
ata0: stat1=0x01 err=0x04 lsb=0x00 msb=0x00
ata0: reset tp2 stat0=10 stat1=01 devices=0x4<ATAPI_MASTER>
ata0: [MPSAFE]
ata1: <ATA channel 1> on atapci1
atapci1: Reserved 0x8 bytes for rid 0x18 type 4 at 0x170
atapci1: Reserved 0x1 bytes for rid 0x1c type 4 at 0x376
ata1: reset tp1 mask=03 ostat0=60 ostat1=70
ata1: stat0=0x20 err=0x20 lsb=0x20 msb=0x20
ata1: stat1=0x30 err=0x30 lsb=0x30 msb=0x30
ata1: reset tp2 stat0=20 stat1=30 devices=0x0
ata1: [MPSAFE]
pci0: <serial bus, SMBus> at device 7.2 (no driver attached)
pci0: <bridge> at device 7.3 (no driver attached)
pcm0: <AMD-8111> port 0xc800-0xc8ff,0xcc00-0xcc3f irq 9 at device 7.5 on pci0
pcm0: Reserved 0x100 bytes for rid 0x10 type 4 at 0xc800
pcm0: Reserved 0x40 bytes for rid 0x14 type 4 at 0xcc00
pcm0: [MPSAFE]
pcm0: <Avance Logic ALC655 AC97 Codec (id = 0x414c4760)>
pcm0: Codec features 5 bit master volume, no 3D Stereo Enhancement
pcm0: Primary codec extended features reserved 1, center DAC, surround DAC, LFE DAC, reserved 5
pcm0: ac97 codec dac ready count: 0
pcm0: sndbuf_setmap 3dadf000, 4000; 0xffffffffa55e7000 -> 3dadf000
pcm0: sndbuf_setmap 3dadb000, 4000; 0xffffffffa55eb000 -> 3dadb000
pnp_identify: Trying Read_Port at 203
pnp_identify: Trying Read_Port at 243
pnp_identify: Trying Read_Port at 283
pnp_identify: Trying Read_Port at 2c3
pnp_identify: Trying Read_Port at 303
pnp_identify: Trying Read_Port at 343
pnp_identify: Trying Read_Port at 383
pnp_identify: Trying Read_Port at 3c3
PNP Identify complete
sc: sc0 already exists; skipping it
vga: vga0 already exists; skipping it
isa_probe_children: disabling PnP devices
isa_probe_children: probing non-PnP devices
orm0: <ISA Option ROMs> at iomem 0xc0000-0xccfff,0xcd000-0xd17ff on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
atkbd: the current kbd controller command byte 0065
atkbd: keyboard ID 0x41ab (2)
kbd0 at atkbd0
kbd0: atkbd0, AT 101/102 (2), config:0x0, flags:0x3d0000
atkbd0: [GIANT-LOCKED]
psm0: current command byte:0065
psm0: failed to reset the aux device.
fdc0 failed to probe at port 0x3f0 irq 6 drq 2 on isa0
ppc0: cannot reserve I/O port range
ppc0: <Parallel port> failed to probe at irq 7 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sc0: fb0, kbd0, terminal emulator: sc (syscons terminal)
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: irq maps: 0 0 0 0
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
sio1: irq maps: 0 0 0 0
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
sio2: not probed (disabled)
sio3: not probed (disabled)
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
isa_probe_children: probing PnP devices
uhub3: vendor 0x0557 product 0x7000, class 9/0, rev 1.10/1.00, addr 2
uhub3: 4 ports with 4 removable, self powered
ukbd0: vendor 0x1241 USB Keyboard, rev 1.10/2.80, addr 3, iclass 3/1
kbd: new array size 4
kbd1 at ukbd0
kbd1: ukbd0, generic (0), config:0x0, flags:0x1d0000
uhid0: vendor 0x1241 USB Keyboard, rev 1.10/2.80, addr 3, iclass 3/1
ums0: Cypress Sem PS2/USB Browser Combo Mouse, rev 1.00/0.00, addr 4, iclass 3/1
ums0: 5 buttons and Z dir.
Device configuration finished.
linprocfs registered
procfs registered
Timecounter "TSC" frequency 1790360410 Hz quality 800
Timecounters tick every 1.000 msec
Linux ELF exec handler installed
DUMMYNET with IPv6 initialized (040826)
lo0: bpf attached
ipfw2 (+ipv6) initialized, divert loadable, rule-based forwarding disabled, default to deny, logging unlimited
em0: Link is up 100 Mbps Full Duplex
ata0-master: pio=PIO4 wdma=WDMA2 udma=UDMA66 cable=40 wire
acd0: setting PIO4 on 8111 chip
acd0: setting UDMA66 on 8111 chip
acd0: <DVDRW IDE 16X/VER A07J> DVDR drive at ata0 as master
acd0: read 172KB/s (8251KB/s) write 8269KB/s (8251KB/s), 2048KB buffer, UDMA66
acd0: Reads: CDR, CDRW, CDDA stream, DVDROM, DVDR, packet
acd0: Writes: CDR, CDRW, DVDR, test write, burnproof
acd0: Audio: play, 256 volume levels
acd0: Mechanism: ejectable tray, unlocked
acd0: Medium: no/blank disc
(probe0:ata0:0:0:0): error 22
(probe0:ata0:0:0:0): Unretryable Error
ata2-master: pio=PIO4 wdma=WDMA2 udma=UDMA133 cable=40 wire
ad4: 239372MB <Maxtor 6B250S0 BANC1E00> at ata2-master SATA150
ad4: 490234752 sectors [486344C/16H/63S] 16 sectors/interrupt 1 depth queue
GEOM: new disk ad4
ata3-master: pio=PIO4 wdma=WDMA2 udma=UDMA133 cable=40 wire
ad6: 476940MB <MAXTOR STM3500630AS 3.AAE> at ata3-master SATA150
ad6: 976773168 sectors [969021C/16H/63S] 16 sectors/interrupt 1 depth queue
pcm0: measured ac97 link rate at 48175 Hz, will use 48000 Hz
(probe7:ata0:0:0:0): error 6
(probe7:ata0:0:0:0): Unretryable Error
GEOM: new disk ad6
(probe7:ata0:0:0:0): error 22
(probe7:ata0:0:0:0): Unretryable Error
(probe0:sbp0:0:0:0): error 22
(probe0:sbp0:0:0:0): Unretryable Error
(probe1:sbp0:0:1:0): error 22
(probe1:sbp0:0:1:0): Unretryable Error
(probe2:sbp0:0:2:0): error 22
(probe2:sbp0:0:2:0): Unretryable Error
(probe3:sbp0:0:3:0): error 22
(probe3:sbp0:0:3:0): Unretryable Error
(probe4:sbp0:0:4:0): error 22
(probe4:sbp0:0:4:0): Unretryable Error
(probe5:sbp0:0:5:0): error 22
(probe5:sbp0:0:5:0): Unretryable Error
(probe6:sbp0:0:6:0): error 22
(probe6:sbp0:0:6:0): Unretryable Error
pass0 at ata0 bus 0 target 0 lun 0
pass0: <DVDRW IDE 16X A07J> Removable CD-ROM SCSI-0 device 
pass0: 66.000MB/s transfers
(cd0:ata0:0:0:0): error 6
(cd0:ata0:0:0:0): Unretryable Error
cd0 at ata0 bus 0 target 0 lun 0
cd0: <DVDRW IDE 16X A07J> Removable CD-ROM SCSI-0 device 
cd0: 66.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
GEOM: new disk cd0
(cd0:ata0:0:0:0): error 6
(cd0:ata0:0:0:0): Unretryable Error
(cd0:ata0:0:0:0): error 6
(cd0:ata0:0:0:0): Unretryable Error
(cd0:ata0:0:0:0): error 6
(cd0:ata0:0:0:0): Unretryable Error
Trying to mount root from ufs:/dev/ad6s2a
start_init: trying /sbin/init
em0: Link is Down
tun0: bpf attached
em0: Link is up 100 Mbps Full Duplex
em0: link state changed to UP

Here is the output of "pciconf -l":

agp0 at pci0:0:0:  class=0x060000 card=0x74541022 chip=0x74541022 rev=0x14 hdr=0x00
pcib1 at pci0:1:0: class=0x060400 card=0x00000000 chip=0x74551022 rev=0x14 hdr=0x01
pcib2 at pci0:6:0: class=0x060400 card=0x000000c0 chip=0x74601022 rev=0x07 hdr=0x01
isab0 at pci0:7:0: class=0x060100 card=0x74681022 chip=0x74681022 rev=0x05 hdr=0x00
atapci1 at pci0:7:1:       class=0x01018a card=0x74691022 chip=0x74691022 rev=0x03 
hdr=0x00
none0 at pci0:7:2: class=0x0c0500 card=0x746a1022 chip=0x746a1022 rev=0x02 hdr=0x00
none1 at pci0:7:3: class=0x068000 card=0x746b1022 chip=0x746b1022 rev=0x05 hdr=0x00
pcm0 at pci0:7:5:  class=0x040100 card=0x746d10f1 chip=0x746d1022 rev=0x03 hdr=0x00
hostb0 at pci0:24:0:       class=0x060000 card=0x00000000 chip=0x11001022 rev=0x00 
hdr=0x00
hostb1 at pci0:24:1:       class=0x060000 card=0x00000000 chip=0x11011022 rev=0x00 
hdr=0x00
hostb2 at pci0:24:2:       class=0x060000 card=0x00000000 chip=0x11021022 rev=0x00 
hdr=0x00
hostb3 at pci0:24:3:       class=0x060000 card=0x00000000 chip=0x11031022 rev=0x00 
hdr=0x00
drm0 at pci1:0:0:  class=0x030000 card=0x01401092 chip=0x59601002 rev=0x01 hdr=0x00
none2 at pci1:0:1: class=0x038000 card=0x01411092 chip=0x59401002 rev=0x01 hdr=0x00
ohci0 at pci2:0:0: class=0x0c0310 card=0x74641022 chip=0x74641022 rev=0x0b hdr=0x00
ohci1 at pci2:0:1: class=0x0c0310 card=0x74641022 chip=0x74641022 rev=0x0b hdr=0x00
em0 at pci2:3:0:   class=0x020000 card=0x11768086 chip=0x10768086 rev=0x00 hdr=0x00
atapci0 at pci2:5:0:       class=0x018000 card=0x31141095 chip=0x31141095 rev=0x02 
hdr=0x00
fwohci0 at pci2:10:0:      class=0x0c0010 card=0x304410f1 chip=0x30441106 rev=0x80 
hdr=0x00
none3 at pci2:11:0:        class=0x0c0300 card=0x30381106 chip=0x30381106 rev=0x61 
hdr=0x00
none4 at pci2:11:1:        class=0x0c0300 card=0x30381106 chip=0x30381106 rev=0x61 
hdr=0x00
ehci0 at pci2:11:2:        class=0x0c0320 card=0x31041106 chip=0x31041106 rev=0x63 
hdr=0x00

>How-To-Repeat:
dd if=/dev/ad4 of=/dev/null skip=9464064
>Fix:
Nope.

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


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