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SubjectATA device reset, shoud I be concerned?
Date
Hello,

During heavy disk load on my laptop, sometimes the IDE disk will pause for a
second and then continue. I get this in my kernel log:

[ 9031.028000] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2
frozen
[ 9031.028000] ata1.00: cmd c8/00:08:90:ca:ce/00:00:00:00:00/e0 tag 0 cdb 0x0
data 4096 in
[ 9031.028000] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
(timeout)
[ 9036.068000] ata1: port is slow to respond, please be patient (Status 0xd0)
[ 9041.052000] ata1: device not ready (errno=-16), forcing hardreset
[ 9041.052000] ata1: soft resetting port
[ 9041.232000] ata1.00: configured for UDMA/100
[ 9041.232000] ata1: EH complete
[ 9041.248000] sd 0:0:0:0: [sda] 78140160 512-byte hardware sectors (40008 MB)
[ 9041.248000] sd 0:0:0:0: [sda] Write Protect is off
[ 9041.248000] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 9041.248000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA

My question: What is this telling me, and do I need to be concerned?
Everything continues to work normally after the message: no I/O errors, no
fsck errors, etc.

I've seen some similar reports on the mailing list, but they include slightly
different messages. I would appreciate any information!

uname -a (on Kubuntu Gutsy, CPU is a single-core 32-bit Pentium M):

Linux superfly 2.6.22-14-386 #1 Tue Dec 18 07:34:24 UTC 2007 i686 GNU/Linux

lspci:

00:00.0 Host bridge: Intel Corporation 82855PM Processor to I/O Controller
(rev 03)
00:01.0 PCI bridge: Intel Corporation 82855PM Processor to AGP Controller (rev
03)
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
USB UHCI Controller #3 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI
Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 81)
00:1f.0 ISA bridge: Intel Corporation 82801DBM (ICH4-M) LPC Interface Bridge
(rev 01)
00:1f.1 IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE Controller (rev
01)
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation NV28 [GeForce4 Ti 4200
Go AGP 8x] (rev a1)
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5705M Gigabit
Ethernet (rev 01)
02:01.0 CardBus bridge: Texas Instruments PCI7510 PC card Cardbus Controller
(rev 01)
02:01.2 FireWire (IEEE 1394): Texas Instruments PCI7410,7510,7610 OHCI-Lynx
Controller
02:01.3 System peripheral: Texas Instruments PCI7410,7510,7610 PCI Firmware
Loading Function
02:03.0 CardBus bridge: Texas Instruments PCI1410 PC card Cardbus Controller
(rev 01)

Thanks!


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