From: Pekka Enberg <penberg@gmail.com>
To: Jens Axboe <axboe@suse.de>
Cc: Lenz Grimmer <lenz@grimmer.com>,
Arjan van de Ven <arjan@infradead.org>,
Alejandro Bonilla <abonilla@linuxwireless.org>,
Jesper Juhl <jesper.juhl@gmail.com>, Dave Hansen <dave@sr71.net>,
hdaps-devel@lists.sourceforge.net,
LKML List <linux-kernel@vger.kernel.org>
Subject: Re: Head parking (was: IBM HDAPS things are looking up)
Date: Thu, 7 Jul 2005 16:28:39 +0300 [thread overview]
Message-ID: <84144f02050707062846365ea9@mail.gmail.com> (raw)
In-Reply-To: <20050707114415.GA24401@suse.de>
On 7/7/05, Jens Axboe <axboe@suse.de> wrote:
> Did it say 'head parked'? If the drive is idle, you wont hear anything.
> Laptop drives auto-park really quickly themselves. A time ./park
> /dev/hda should tell you whether it needed to park or not, if it
> executes faster than a few hundred ms it was already parked.
Aah, you're right.
haji tmp # time ./a.out /dev/hda
head parked
real 0m0.421s
user 0m0.000s
sys 0m0.001s
Immediately after that:
haji tmp # time ./a.out /dev/hda
head parked
real 0m0.001s
user 0m0.000s
sys 0m0.001s
And then I do bit of disk reads and I get this again:
haji tmp # time ./a.out /dev/hda
head parked
real 0m0.429s
user 0m0.001s
sys 0m0.001s
So looks like it works for me too.
Pekka
next prev parent reply other threads:[~2005-07-07 13:32 UTC|newest]
Thread overview: 72+ 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
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 [this message]
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
-- strict thread matches above, loose matches on Subject: below --
2005-07-07 13:13 Head parking (was: IBM HDAPS things are looking up) Martin Knoblauch
2005-07-07 13:38 ` Pekka Enberg
2005-07-07 13:47 ` Martin Knoblauch
2005-07-07 14:45 ` Dan Christensen
2005-07-07 16:39 ` Martin Knoblauch
2005-07-07 16:54 ` Alejandro Bonilla
2005-07-07 17:14 ` Martin Knoblauch
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