It appears that the problem was caused by a faulty power supply. Thanks 
anyway!

On Tuesday 15 January 2008 11:54:35 Andrew Morton wrote:

On Mon, 14 Jan 2008 00:19:20 +0200 Georgi Chulkov 

[off-list ref] wrote:

quoted

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

Has it done this in all kernel versions or did some earler version work OK?
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