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SubjectRe: ATA device reset, shoud I be concerned?
On Mon, 14 Jan 2008 00:19:20 +0200 Georgi Chulkov <g.chulkov@jacobs-university.de> wrote:

> 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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