From: Jens Axboe <axboe@suse.de>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Alejandro Bonilla <abonilla@linuxwireless.org>,
Lenz Grimmer <lenz@grimmer.com>,
Jesper Juhl <jesper.juhl@gmail.com>, Dave Hansen <dave@sr71.net>,
Henrik Brix Andersen <brix@gentoo.org>,
hdaps-devel@lists.sourceforge.net,
LKML List <linux-kernel@vger.kernel.org>
Subject: Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Date: Mon, 4 Jul 2005 09:30:32 +0200 [thread overview]
Message-ID: <20050704073031.GI1444@suse.de> (raw)
In-Reply-To: <1120462037.3174.25.camel@laptopd505.fenrus.org>
On Mon, Jul 04 2005, Arjan van de Ven wrote:
>
> >
> > Yeah, that likely needs a little help from the ide driver. If you force
> > a spindown, you will effectively have parked the head for as long as the
> > spindown + spinup takes. That could turn out to be enough, it will take
> > more than 1-2 seconds anyways.
>
> I doubt it; laptop disks seem to be optimized for spinning up/down fast
> (for powersaving reasons) so while for normal disks I'd agree with you,
> for laptop disks I'm far less sure.
It isn't too pretty to rely on such unreliable timing anyways. I'm not
too crazy about spinning the disk down either, it's useless wear
compared to just parking the head.
--
Jens Axboe
next prev parent reply other threads:[~2005-07-04 7:39 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-04 1:32 IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer)) Jesper Juhl
2005-07-04 2:12 ` Alejandro Bonilla
2005-07-04 6:00 ` Lenz Grimmer
2005-07-04 6:17 ` Jens Axboe
2005-07-04 5:30 ` Alejandro Bonilla
2005-07-04 6:37 ` Jens Axboe
2005-07-04 7:16 ` Arjan van de Ven
2005-07-04 7:22 ` Jens Axboe
2005-07-04 7:27 ` Arjan van de Ven
2005-07-04 7:30 ` Jens Axboe [this message]
2005-07-04 10:33 ` Lenz Grimmer
2005-07-04 11:06 ` Jens Axboe
2005-07-04 13:18 ` IBM HDAPS things are looking up Lenz Grimmer
2005-07-04 13:25 ` Jens Axboe
2005-07-04 14:32 ` [Hdaps-devel] " Shawn Starr
2005-07-07 8:03 ` IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer)) Jens Axboe
2005-07-07 8:41 ` Head parking (was: IBM HDAPS things are looking up) Lenz Grimmer
2005-07-07 8:48 ` Jens Axboe
2005-07-07 10:17 ` [Hdaps-devel] " Lenz Grimmer
2005-07-07 15:06 ` Shawn Starr
2005-07-07 9:07 ` Pekka Enberg
2005-07-07 11:44 ` Jens Axboe
2005-07-07 13:28 ` Pekka Enberg
2005-07-07 14:28 ` IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer)) Shawn Starr
2005-07-07 14:37 ` Alejandro Bonilla
2005-07-07 15:06 ` Jens Axboe
2005-07-07 20:43 ` Folkert van Heusden
2005-07-07 15:05 ` Jens Axboe
2005-07-07 23:00 ` Jon Escombe
2005-07-07 23:31 ` Alejandro Bonilla
2005-07-08 6:31 ` Jens Axboe
2005-07-08 18:32 ` Shawn Starr
2005-07-07 15:03 ` Shawn Starr
2005-07-07 17:02 ` Clemens Koller
2005-07-07 17:15 ` Alejandro Bonilla
2005-07-07 17:34 ` Jens Axboe
2005-07-07 17:49 ` Matthew Garrett
2005-07-07 18:52 ` Jens Axboe
2005-07-07 17:27 ` Jens Axboe
2005-07-07 17:38 ` Dave Hansen
2005-07-07 18:01 ` Lee Revell
2005-07-07 18:03 ` Dave Hansen
2005-07-07 18:48 ` Jens Axboe
2005-07-04 13:03 ` Pavel Machek
2005-07-04 20:30 ` IBM HDAPS things are looking up Lenz Grimmer
2005-07-04 22:12 ` Pavel Machek
2005-07-04 21:08 ` IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer)) Alejandro Bonilla
2005-07-05 7:14 ` Jens Axboe
2005-07-05 12:29 ` Alejandro Bonilla
2005-07-05 15:41 ` Sander
2005-07-05 15:52 ` Alejandro Bonilla
2005-07-05 15:45 ` Lee Revell
2005-07-04 10:28 ` Lenz Grimmer
2005-07-04 14:27 ` Shawn Starr
2005-07-04 14:46 ` Jens Axboe
2005-07-04 17:24 ` IBM HDAPS things are looking up Alejandro Bonilla
2005-07-04 18:36 ` dean gaudet
2005-07-05 5:13 ` Lee Revell
2005-07-04 18:40 ` Jens Axboe
2005-07-04 18:59 ` IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer)) Aaron Cohen
2005-07-04 19:27 ` Lenz Grimmer
2005-07-04 8:45 ` Andrey Panin
2005-07-04 10:49 ` Pekka Enberg
2005-07-04 11:00 ` Jesper Juhl
2005-07-04 12:32 ` Pavel Machek
[not found] <4msjB-DS-9@gated-at.bofh.it>
[not found] ` <4mste-IL-1@gated-at.bofh.it>
[not found] ` <4msME-SM-9@gated-at.bofh.it>
[not found] ` <4msWl-Yq-5@gated-at.bofh.it>
[not found] ` <4mtza-1vg-15@gated-at.bofh.it>
[not found] ` <4mtII-1Ab-13@gated-at.bofh.it>
[not found] ` <4mtSm-1FA-5@gated-at.bofh.it>
[not found] ` <4mtSn-1FA-11@gated-at.bofh.it>
[not found] ` <4mwx1-3N9-25@gated-at.bofh.it>
[not found] ` <4mx9A-4qm-1@gated-at.bofh.it>
[not found] ` <4nzCr-6fN-19@gated-at.bofh.it>
[not found] ` <4nI36-527-9@gated-at.bofh.it>
2005-07-08 0:56 ` Bodo Eggert
2005-07-08 6:26 ` Jens Axboe
2005-07-08 8:49 ` Vojtech Pavlik
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