linux-kernel - Re: [2.6.21.1] SATA freeze

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Date:	Sat, 12 May 2007 19:02:38 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Fred Moyer <fred@...hotpenguin.com>
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: [2.6.21.1] SATA freeze

Fred Moyer wrote:
>> 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
> 

Sounds like SMART is likely disabled on that drive. You can try doing 
"smartctl -s on /dev/sda" and see if that will turn it on.

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@...pamshaw.ca
Home Page: http://www.roberthancock.com/

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