From: Mike Fedyk <mfedyk@matchmail.com>
To: Helge Hafting <helgehaf@aitel.hist.no>
Cc: linux-kernel@vger.kernel.org
Subject: Re: IDE/raid performance
Date: Thu, 18 Apr 2002 14:22:20 -0700 [thread overview]
Message-ID: <20020418212220.GH574@matchmail.com> (raw)
In-Reply-To: <Pine.LNX.4.21.0204171108480.3300-100000@ns> <E16xrfQ-0002VF-00@the-village.bc.nu> <20020417102722.B26720@vger.timpanogas.org> <20020417134716.D10041@borg.org> <20020417232634.GC574@matchmail.com> <3CBE78A0.D5AD8AC2@aitel.hist.no>
On Thu, Apr 18, 2002 at 09:41:20AM +0200, Helge Hafting wrote:
> Mike Fedyk wrote:
>
> > I'd imagine that IDE would need some protocol spec changes before this could
> > be supported (at least a "spin the drive up" message...).
> >
> Exists already. You may use hdparm to tell IDE drives
> to spin up and down or even set a timeout. This is
> mostly for power-saving or no-noise setups.
>
Oh yes, I know about that, but didn't remember it when I posted.
> So they could indeed add a jumper to IDE drives to let them
> power up in the spun-down state. But that's not what
> the vast majority of one-disk users want.
>
This is the specific thing I was talking about. Even if the drive can power
down with a command, it doesn't wait for a command to perform the spinup
when power is applied, and that's what's missing.
It seems like there is already protocol support in IDE, so the drive just
needs a way to be configured... Maybe some drives will allow software
config of this when they implement it?
next prev parent reply other threads:[~2002-04-18 21:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-17 12:58 IDE/raid performance Baldur Norddahl
2002-04-17 13:43 ` Mike Dresser
2002-04-17 14:00 ` Baldur Norddahl
2002-04-17 15:15 ` nick
2002-04-17 15:48 ` Alan Cox
2002-04-17 17:27 ` Jeff V. Merkey
2002-04-17 17:47 ` Kent Borg
2002-04-17 17:48 ` nick
2002-04-17 23:26 ` Mike Fedyk
2002-04-18 6:47 ` Andre Hedrick
2002-04-18 7:41 ` Helge Hafting
2002-04-18 21:22 ` Mike Fedyk [this message]
2002-04-17 17:36 ` Baldur Norddahl
2002-04-17 17:41 ` Mike Dresser
2002-04-17 17:46 ` nick
2002-04-17 22:35 ` dean gaudet
2002-04-17 23:52 ` Alan Cox
2002-04-17 20:36 ` Kurt Garloff
2002-04-21 19:01 ` Pavel Machek
2002-04-18 15:51 ` Bill Davidsen
2002-04-18 18:33 ` Mike Galbraith
2002-04-17 15:09 ` Bill Davidsen
2002-04-17 18:38 ` Andre Hedrick
2002-04-17 22:44 ` Lincoln Dale
2002-04-18 0:38 ` Mike Fedyk
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