From: Artem Bityutskiy <dedekind1@gmail.com>
To: Ricard Wanderlof <ricard.wanderlof@axis.com>
Cc: liulunzuo <liulunzuo@gmail.com>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>
Subject: Re: Dose linux-mtd really support mlc nand flash?
Date: Mon, 25 Jan 2010 11:56:13 +0200 [thread overview]
Message-ID: <1264413373.2549.28.camel@localhost> (raw)
In-Reply-To: <Pine.LNX.4.64.1001250947000.32263@lnxricardw.se.axis.com>
On Mon, 2010-01-25 at 09:53 +0100, Ricard Wanderlof wrote:
> On Sat, 23 Jan 2010, liulunzuo wrote:
>
> > Mlc nand flash should be write only once per write operation(NOP=1),
> > but i found when i use mtd-utils to write a mtdchar device with oob ,
> > it write a page twice: page and oob zone wrote separately,
> > and mtdchar.c support no way to write a page and oob zone to the mlc
> > nand flash at the same time.
>
> As far as I understand, mtd has not been used very much with MLC flash.
> There are some thoughts about using UBI on MLC
> (http://www.linux-mtd.infradead.org/faq/ubifs.html#L_why_ubiformat) but it
> seems it hasn't been tested to any extent. At any rate, UBI does not use
> the spare area in the flash for itself (like jffs2 does with cleanmarkers
> in empty blocks. Don't know how yaffs goes about its stuff).
Yeah, a little better links for the MLC thoughts, though:
http://www.linux-mtd.infradead.org/faq/ubi.html#L_mlc
http://www.linux-mtd.infradead.org/faq/ubifs.html#L_ubifs_mlc
--
Best Regards,
Artem Bityutskiy (Артём Битюцкий)
prev parent reply other threads:[~2010-01-25 9:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-23 9:51 Dose linux-mtd really support mlc nand flash? liulunzuo
2010-01-25 8:53 ` Ricard Wanderlof
2010-01-25 9:56 ` Artem Bityutskiy [this message]
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