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Date: Fri, 27 Apr 2007 14:50:03 +0200
From: Matthieu CASTET <matthieu.castet@parrot.fr>
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To: Josh Boyer <jwboyer@gmail.com>
Subject: Re: FAT file system on NAND flash memory
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Cc: linux-mtd@lists.infradead.org, Seongsu Lee <senux@senux.com>
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Hi,

Josh Boyer a écrit :
> On 4/12/07, Seongsu Lee <senux@senux.com> wrote:
>> Hi,
>>
>> In my knowledge, mtdblock.c must be used to use
>> FAT filesystem on bare NAND flash memories
>> because NFTL is made only for a specific hardware,
>> DiskOnChip.
>>
>> (Layer 0) VFS
>> (Layer 1) FAT (or EXT2, EXT3)
>> (Layer 2) mtdblock.c (nftl.c can be used only with DiskOnChip)
>> (Layer 3) NAND flash memory driver (vendor specific)
>> (Layer 4) Physical NAND flash memory
>>
>> Please let me know if it is wrong.
> 
> That layering is correct, but your results will be bad.  mtdblock
> doesn't handle bad blocks.  So if you have one in the middle of your
> filesystem, it will break things.  You need some kind of translation
> layer if you're going to use NAND.
> 
But UBI could be used between nand and mtdblock ?


Matthieu