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Date: Thu, 22 Dec 2005 20:07:14 +0300
From: "Artem B. Bityutskiy" <dedekind@yandex.ru>
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To: Josh Boyer <jwboyer@gmail.com>
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Cc: linux-mtd@lists.infradead.org, Nikhil <nikhils@cdac.in>
Subject: Re: CLEANMARKER!!
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Josh Boyer wrote:
> It's an optimization of mkfs.jffs2.  If it didn't write those
> cleanmarkers in the image, JFFS2 would scan flash, find free
> eraseblocks, and go erase them again since the cleanmarker is missing.
>  With the cleanmarkers there, the erase of already erased blocks is
> omitted.
Well, this is for empty eraseblocks. Those with data could be devoid of 
cleanmarkers.

-- 
Best Regards,
Artem B. Bityutskiy,
St.-Petersburg, Russia.