linux-kernel - Re: [Patch] document ext3 requirements (was Re: [RFD] Incremental fsck)

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Message-ID: <4d47a5d10801151544k3bc50223ob69c25d8732e3f12@mail.gmail.com>
Date:	Tue, 15 Jan 2008 18:44:26 -0500
From:	"Daniel Phillips" <phillips@...gle.com>
To:	"Pavel Machek" <pavel@....cz>
Cc:	"David Chinner" <dgc@....com>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>,
	"Theodore Tso" <tytso@....edu>, "Al Boldi" <a1426z@...ab.com>,
	"Valerie Henson" <val.henson@...il.com>,
	"Rik van Riel" <riel@...hat.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [Patch] document ext3 requirements (was Re: [RFD] Incremental fsck)

On Jan 15, 2008 6:07 PM, Pavel Machek <pavel@....cz> wrote:
> I had write cache enabled on my main computer. Oops. I guess that
> means we do need better documentation.

Writeback cache on disk in iteself is not bad, it only gets bad if the
disk is not engineered to save all its dirty cache on power loss,
using the disk motor as a generator or alternatively a small battery.
It would be awfully nice to know which brands fail here, if any,
because writeback cache is a big performance booster.

Regards,

Daniel
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