linux-kernel - Re: [2.6.28-rc] Sata soft reset filling log

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Date:	Sun, 21 Dec 2008 22:59:30 -0800
From:	Justin Madru <jdm64@...ab.com>
To:	Tejun Heo <tj@...nel.org>
CC:	lkml <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-ide@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: [2.6.28-rc] Sata soft reset filling log

Tejun Heo wrote:
> Hello,
>
> Justin Madru wrote:
>   
>> I've been testing .28 (currently -rc8) and I've noticed in the logs a
>> massive amount of the following.
>> I can confirm that the messages doesn't appear when booting into a .27
>> kernel.
>>
>> ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>> ata2.00: ST_FIRST: !(DRQ|ERR|DF)
>> ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>         cdb 1e 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
>>         res 50/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x2 (HSM violation)
>> ata2.00: status: { DRDY }
>> ata2: soft resetting link
>> ata2.00: configured for UDMA/33
>> ata2: EH complete
>>     
>
> That's HSM violation on ALLOW_MEDIUM_REMOVAL on the second ATA port.
>
>   
>> I get this block of messages about every 20 seconds for as long as I'm
>> booted into a .28 kernel.
>> It seems that the sata link is being soft reseted about every _20_ secs.
>> My drive is a sata drive that should be using UDMA/133 (right?),
>> but the "error" message says configuring for UDMA/33.
>> Does this mean that my drive is running at a slower speed?
>> Should I be worried about the .28 kernel corrupting my hardware? Is this
>> a known issue?
>> How can I stop it from filling my logs!
>>
>> Some information about my computer:
>>
>> 00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA
>> IDE Controller (rev 01)
>>
>> $ hdparm -I /dev/sda
>> /dev/sda:
>> ATA device, with non-removable media
>>        Model Number:       ST980811AS
>>     
>
> and I strongly doubt it's the hard drive.  Can you please post full
> kernel log including the boot messages?
>
> Thanks.
>
>   
Well, it's good to hear that you don't think my drive is failing (sure 
hope it's not failing!)

I posted the full dmesg in reply to Alan in 
http://lkml.org/lkml/2008/12/19/30.
Also, more information about my computer can be found at: 
http://jdserver.homelinux.org/bugreports/
If you need me to run anything else not found in the above links then 
let me know.

Justin Madru

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