From: Scott Lee <scottlee@redhot.rose.hp.com>
To: linux-kernel@vger.kernel.org
Cc: axboe@suse.de
Subject: Re: [PATCH] ide write barriers
Date: Wed, 26 Feb 2003 12:31:36 -0800 (PST) [thread overview]
Message-ID: <200302262031.MAA18505@redhot.rose.hp.com> (raw)
> The goal is to make the use of write
> back cache enabled ide drives safe with journalled file systems.
Does this mean that having write caching enabled is not safe if you are using ext3 on an IDE drive? Should "hdparm -W 0 /dev/hda" be used for example. (I see a 50% performance hit using "-W 0" when my box is under load.) If this is the case, what is the root cause? Do IDE drives reorder writes when they are cached?
Thank you in advance for any guidance.
Scott Lee
next reply other threads:[~2003-02-26 20:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-26 20:31 Scott Lee [this message]
2003-02-26 20:46 ` Jens Axboe
2003-02-27 21:57 ` Andre Hedrick
-- strict thread matches above, loose matches on Subject: below --
2003-02-26 21:20 LEE,SCOTT (HP-Roseville,ex1)
2003-02-26 23:10 ` Alan Cox
2003-02-05 15:18 Jens Axboe
2003-02-05 15:28 ` Marc-Christian Petersen
2003-02-05 16:33 ` Jens Axboe
2003-02-05 19:53 ` Marc-Christian Petersen
2003-02-06 9:26 ` Jens Axboe
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