From: David Brown <mtd@davidb.org>
To: Nancy <nancydreaming@gmail.com>
Cc: linux-mtd@lists.infradead.org, kmpark@infradead.org
Subject: Re: Does UBI support MLC nand flash?
Date: Tue, 1 Jan 2008 23:13:06 -0800 [thread overview]
Message-ID: <20080102071306.GA10292@old.davidb.org> (raw)
In-Reply-To: <bae050c10801012219m71d7415du4379e5b5d5a54560@mail.gmail.com>
On Wed, Jan 02, 2008 at 02:19:16PM +0800, Nancy wrote:
>oh, forgot to metion UBI.
>UBI has two headers for each LED/PED, they are not write at same time.
>Is that against MLC nand's no ramdom write and write only once
>permission?
Yes. Perhaps one could be written at the beginning of the block and one
always written at the end of the block. It wastes more pages that way,
though.
If the second write is only to indicate that the block is invalid, it
_might_ be permissible to write it out of order, since the out of order
write might only corrupt data. Depending on underlying device
implementation, it might also just not work, though.
Dave
next prev parent reply other threads:[~2008-01-02 7:16 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-02 1:42 Does UBI support MLC nand flash? Nancy
2008-01-02 4:45 ` Kyungmin Park
2008-01-02 6:13 ` Nancy
2008-01-02 6:19 ` Nancy
2008-01-02 7:13 ` David Brown [this message]
2008-01-02 12:39 ` Josh Boyer
2008-01-02 16:52 ` David Brown
2008-01-02 17:13 ` Josh Boyer
2008-01-02 17:17 ` David Brown
2008-01-03 7:19 ` Nancy
2008-01-02 7:11 ` David Brown
2008-01-02 7:23 ` Kyungmin Park
[not found] ` <bae050c10801020133h3b121b2ft47911a0d84921868@mail.gmail.com>
2008-01-02 9:36 ` Nancy
2008-01-02 9:37 ` Nancy
2008-01-02 7:27 ` David Brown
2008-01-02 13:46 ` Adrian Hunter
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