Message-ID: <491103CA.7090905@shaw.ca>
Date: Tue, 04 Nov 2008 20:24:10 -0600
From: Robert Hancock <hancockr@shaw.ca>
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To: Mark Lord <liml@rtr.ca>
CC: Linus Torvalds <torvalds@linux-foundation.org>,
       Pavel Machek <pavel@suse.cz>, Jeff Garzik <jeff@garzik.org>,
       Andrew Morton <akpm@linux-foundation.org>, linux-ide@vger.kernel.org,
       LKML <linux-kernel@vger.kernel.org>
Subject: Re: [git patches] libata hibernation fixes
References: <fa.Ast7pgG6P20u1PcyOsfgzoaX5YA@ifi.uio.no> <fa.1+JQHm7yjIiZJxAzR0eBPn39a9M@ifi.uio.no> <fa.8GbzH83c2CAI53n9dyzVOFugmoc@ifi.uio.no> <fa.hGdpNHQGmXAR19JiGuHxSr9N9CA@ifi.uio.no> <4910E6CD.9090605@mail.usask.ca> <49110093.5090506@rtr.ca>
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Mark Lord wrote:
> Robert Hancock wrote:
>>
>> IDLE IMMEDIATE just transitions the device to the Idle state, which is 
>> normally parked/unloaded and spun down.
> ..
> 
> No, you're confusing "IDLE" with "STANDBY".  IDLE just puts the drive
> electronics into a lower-power state than "ACTIVE", but normally leaves
> the platters spinning.
> 
> The "UNLOAD" enhancement causes it to also "unload" or "park" (drive's 
> option)
> the heads as part of this action.
> 
> "STANDBY" is the command set which parks heads and spins down the platters.

Right, STANDBY IMMEDIATE was the one I was thinking of.
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