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Date: Tue, 4 Nov 2008 22:26:54 +1100 (EST)
From: Tim Connors <tconnors@rather.puzzling.org>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
cc: linux-ide@vger.kernel.org
Subject: sata error on ICH8M
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I'm running a debian 2.6.26-9 kernel (sid) on a new laptop with:
00:1f.2 SATA controller: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA AHCI Controller (rev 03) (prog-if 01 [AHCI 1.0])
        Subsystem: Dell Device 0275
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin B routed to IRQ 378
        Region 0: I/O ports at 1c00 [size=8]
        Region 1: I/O ports at 18d4 [size=4]
        Region 2: I/O ports at 18d8 [size=8]
        Region 3: I/O ports at 18d0 [size=4]
        Region 4: I/O ports at 18e0 [size=32]
        Region 5: Memory at f8504000 (32-bit, non-prefetchable) [size=2K]
        Capabilities: [80] Message Signalled Interrupts: Mask- 64bit- Queue=0/2 Enable+
                Address: fee0300c  Data: 41a1
        Capabilities: [70] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold-)
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [a8] SATA HBA <?>
        Kernel driver in use: ahci
        Kernel modules: ahci

Soon after booting, and possibly after the disk had spun down and was
asked to spin back up (which it had done successfully a few times so
far, with a spinddown timeout of 10 minutes, and using laptop_mode), it
had a sata error:

Nov  4 01:49:29 gamow kernel: [ 1865.106289] ata1.00: exception Emask 0x10 SAct 0x3ff SErr 0x50000 action 0xe frozen
Nov  4 01:50:29 gamow kernel: [ 1865.106307] ata1: SError: { PHYRdyChg CommWake }
Nov  4 01:50:29 gamow kernel: [ 1865.106319] ata1.00: cmd 61/08:00:bd:c9:57/00:00:00:00:00/40 tag 0 ncq 4096 out
Nov  4 01:50:29 gamow kernel: [ 1865.106322]          res 40/00:00:02:4f:c2/00:00:00:00:00/00 Emask 0x14 (ATA bus error)
Nov  4 01:50:29 gamow kernel: [ 1865.106329] ata1.00: status: { DRDY }
Nov  4 01:50:29 gamow kernel: [ 1865.106339] ata1.00: cmd 61/08:08:35:7a:73/00:00:00:00:00/40 tag 1 ncq 4096 out
Nov  4 01:50:29 gamow kernel: [ 1865.106343]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x14 (ATA bus error)
Nov  4 01:50:29 gamow kernel: [ 1865.106350] ata1.00: status: { DRDY }
Nov  4 01:50:29 gamow kernel: [ 1865.106361] ata1.00: cmd 61/08:10:35:36:9b/00:00:00:00:00/40 tag 2 ncq 4096 out
Nov  4 01:50:29 gamow kernel: [ 1865.106364]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x14 (ATA bus error)
Nov  4 01:50:29 gamow kernel: [ 1865.106371] ata1.00: status: { DRDY }
Nov  4 01:50:29 gamow kernel: [ 1865.106382] ata1.00: cmd 61/28:18:55:94:e2/00:00:00:00:00/40 tag 3 ncq 20480 out

And then it fails to reset after some time, remounting the devices
readonly (although what wasn't already in the cache became unreadable with
lots of IO errors rapidly filling up dmesg).  None of the logs made it to
disk, naturally enough, and this was what I caught in syslog before syslog
bailed.  There were interesting messages that happened after this, but the
dmesg buffer filled up before I thought about saving them.

My /sys/class/scsi_host/host0/link_power_management_policy is:
min_power
.  powertop had earlier (in a previous warm-boot) prompted me
to set link_power_management_policy, so I had been tweaking that, but I
didn't look at its default setting - I presume it was already at
min_power, as it is now from a fresh (cold) bootup.

Just in case it is related, in each bootup, I earlier get
Nov  4 01:20:26 gamow kernel: [  116.217492] CE: hpet increasing min_delta_ns to 15000 nsec
Nov  4 01:20:28 gamow kernel: [  118.073078] CE: hpet increasing min_delta_ns to 22500 nsec
Nov  4 01:20:30 gamow kernel: [  120.467250] ACPI: EC: missing confirmations, switch off interrupt mode.
Nov  4 01:20:30 gamow kernel: [  120.603593] CE: hpet increasing min_delta_ns to 33750 nsec
Nov  4 01:20:31 gamow kernel: [  121.004372] ACPI Exception (evregion-0420): AE_TIME, Returned by Handler for [EmbeddedControl] [20080321]
Nov  4 01:20:31 gamow kernel: [  121.004372] ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.LPCB.BAT1._BST] (Node ffff81013fa6cb90), AE_TIME
Nov  4 01:20:31 gamow kernel: [  121.004372] ACPI Exception (battery-0360): AE_TIME, Evaluating _BST [20080321]

and/or

[ 1587.842640] CE: hpet increasing min_delta_ns to 15000 nsec
(successively increasing as time goes on)

The sata link went belly up perhaps a few minutes after I went to bed
lastnight, and the only thing I can think of that I did before then was to
unplug and replug the ethernet and/or the wireless.  The ACPI messages
seem to happen around networking events on this laptop, but I haven't had
a chance to investigate further.

-- 
TimC
You must realize that the computer has it in for you.  The irrefutable
proof of this is that the computer always does what you tell it to do.
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