linux-kernel - Re: [2.6.21.1] SATA freeze

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Date:	Sat, 12 May 2007 12:09:43 -0700
From:	Fred Moyer <fred@...hotpenguin.com>
To:	Robert Hancock <hancockr@...w.ca>
CC:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: [2.6.21.1] SATA freeze

Robert Hancock wrote:
> Fred Moyer wrote:
>> I just joined the list today so apologies if this email breaks any 
>> email client post threading.
>>
>> I have been seeing similar errors on two different systems.  I applied 
>> Robert's sata_nv patch posted to the list on May 5th, and approved 
>> today by Jeff Garzik.  I've taken several steps to insure that this 
>> isn't a faulty cable or drive issue.  This is running on a hp 
>> dl145g2.  Here is my lspci, dmesg, and relevant kernel config sections:
> 
> (snip)
> 
>> ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
>> ata1.00: cmd b0/d2:f1:00:4f:c2/00:00:00:00:00/00 tag 0 cdb 0x0 data 
>> 123392 in
>>          res 50/00:f1:00:4f:c2/00:00:00:00:00/00 Emask 0x202 (HSM 
>> violation)
>> ata1: soft resetting port
>> ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>> ata1.00: configured for UDMA/100
>> ata1: EH complete
> 
> This appears to be a different problem. Something is issuing 
> SMART-related commands (smartd or smartctl perhaps) which the drive 
> seems to be reacting strangely to. It apparently completed the command 
> but never raised DRQ to request any data being transferred even though 
> we expected it to. Maybe SMART is disabled on the drive and that's 
> causing it to just toss these commands? CCing linux-ide in case anyone 
> knows what would cause this.

Here's smartctl -a for this drive - same output for both sda and sdb. 
Smartd is currently running.  Any advice appreciated.

Previously on 2.6.15 I was seeing sdb remount as readonly under heavy 
i/o.  I have not seen that issue yet with 2.6.21 (with Robert's patch 
from May 5th for sata_nv), but that occurrence of remounts read-only was 
infrequently, so that issue may be solved.

app2 ~ # smartctl -a /dev/sda
smartctl version 5.36 [x86_64-pc-linux-gnu] Copyright (C) 2002-6 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

Device: ATA      ST3808110AS      Version: n/a
Serial number:             5LR8895K
Device type: disk
Local Time is: Sat May 12 12:05:58 2007 PDT
Device does not support SMART

Error Counter logging not supported

[GLTSD (Global Logging Target Save Disable) set. Enable Save with '-S on']
Device does not support Self Test logging

app2 ~ # ps aux | grep smart
root      5227  0.0  0.0   2892   672 ?        S    May11   0:00 
/usr/sbin/smartd -p /var/run/smartd.pid
root     19510  0.0  0.0   2648   648 pts/0    S+   12:07   0:00 grep 
--colour=auto smart
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