Does this restriction mean that you can't for example perform a
program to the data area of a page X, move on to programing other
pages and erase units, and later program the spare area of page X?

Thank you



On Sun, Mar 2, 2008 at 9:45 PM, Charles Manning <manningc2@actrix.gen.nz> wrote:
> On Wednesday 27 February 2008 03:46:51 shizheng@Alumni wrote:
>  > Thanks a lot. I have another question to ask.
>  > Do all kinds of 2kB-page NAND flash obey to the sequential page writing
>  > order rule?
>
>  Almost all modern 2k+ flash have a restriction in the pages should be written
>  in sequential order. While they might still work in other write orders this
>  tends to make them disrupt more bits.
>
>  That is one of the reasons yaffs2 was designed to only do sequential writes.
>
>  -- Charles
>
>
> >
>  > rohit h wrote:
>  > >> It has a program limitation that the program addressing should
>  > >> be done in sequential order in a block, i.e. random page address
>  > >> programming is prohibited.
>  > >>
>  > >> We are new to Yaffs, so I wanna know if yaffs support such kind of
>  > >> NAND device.
>  > >
>  > > Yaffs2 only programs sequentially in a block, starting from page 0
>  > > and ending at the last page.
>  > >
>  > > Quote from http://www.yaffs.net/node/38:
>  > > "The original motivation for YAFFS 2 was to add support for the new
>  > > NAND with 2kB pages instead of 512-byte pages and strictly sequential
>  > > page writing order."
>  >
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