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

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Message-ID: <4d47a5d10801161802x2c24ef59pf8422c8d14d487aa@mail.gmail.com>
Date:	Wed, 16 Jan 2008 21:02:50 -0500
From:	"Daniel Phillips" <phillips@...gle.com>
To:	"Bryan Henderson" <hbryan@...ibm.com>
Cc:	"Al Boldi" <a1426z@...ab.com>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>,
	"David Chinner" <dgc@....com>, linux-kernel@...r.kernel.org,
	"Pavel Machek" <pavel@....cz>, "Rik van Riel" <riel@...hat.com>,
	"Theodore Tso" <tytso@....edu>,
	"Valerie Henson" <val.henson@...il.com>
Subject: Re: [Patch] document ext3 requirements (was Re: [RFD] Incremental fsck)

On Jan 16, 2008 2:06 PM, Bryan Henderson <hbryan@...ibm.com> wrote:
> >The "disk motor as a generator" tale may not be purely folklore.  When
> >an IDE drive is not in writeback mode, something special needs to done
> >to ensure the last write to media is not a scribble.
>
> No it doesn't.  The last write _is_ a scribble.

Have you observed that in the wild?  A former engineer of a disk drive
company suggests to me that the capacitors on the board provide enough
power to complete the last sector, even to park the head.

Regards,

Daniel
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