Date: Wed, 21 Feb 2007 20:43:20 -0600
From: Robert Hancock <hancockr@shaw.ca>
Subject: Re: Weird hard disk noise on shutdown (bug #7674)
In-reply-to: <fa.YHt2nIlQmoW5r2enmTSzsaySwH4@ifi.uio.no>
To: Alan <alan@lxorguk.ukuu.org.uk>,
       linux-kernel <linux-kernel@vger.kernel.org>
Cc: Francesco Pretto <ceztko@gmail.com>, Tejun Heo <htejun@gmail.com>
Message-id: <45DD0348.5040005@shaw.ca>
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Alan wrote:
> Stick some printk calls in drivers/ata/libata-eh.c in ata_eh_suspend, or
> turn on all the ATA debug and shutdown, the code should issue a cache
> flush followed by a standbynow1 command for each disk.
> 
> Alan

I believe it runs on suspend, but we don't run that code on normal 
shutdown, do we?

Tejun Heo had a patch for sd that could (optionally) trigger a START 
STOP UNIT command to spin the disk down after synchronizing the cache 
before shutdown, but I haven't heard anything of it lately..

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

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