[UBI] UFFS : Unified Flash File System

[Liu Hui]

This is interesting. I have some questions about UFFS:
1)UFFS can work both with bare flash(MTD or UBI) and FTL(as a block
device), how do you organize the metadata of UFFS(log-structured?).
2)As we know, bare flash and FTL provide very different interfaces for
FS. For MTD, FS should do garbage collection, wear leveling, bad block
management by itself; For UBI, FS should also do garbage collection
and wear leveling; and for FTL, FS just treat flash as block device.
What will UFFS do to treat all of kind of interfaces? Will UFFS
provide different strategy for different interfaces?

-- 
Thanks & Best Regards
Liu Hui
--


2008/11/25 Sidney Amani <seed95 at gmail.com>:
> Hi,
>
> We are forth year Epitech (www.epitech.eu) students, our six member
> team plan to use and maybe improve UBI as part of our end studies
> project.
>
> Our project is UFFS for Unified Flash File System, Unified because it
> is going to allow mounting any kind of NAND Flash Memory, this means
> any bare Flash or Flash on top of FTL.
>
> It is also going to be ported on several operating systems, we plan to
> supported on Fuse (Linux, *BSD, MacOs-X) and Windows and Linux (as a
> Kernel module).
>
>      UFFS
>   ____/|\
>  /        | \
> Block    |  |\
>  |        |  |  \
>  FTL     |  |   \
>  |\____/  |    \
>  |       |   |     |
>  |     UBI |     |
>  \       \   |     |
>   \       \_|     |
>    \         |     |
>     \      MTD |
>      \____|___|
>              |
>           NAND
>
> This scheme means if  UBI is available we use it but if it's not
> (WinCE) we have to develop a UBI-Like layer.
>
> We contactyou to let you know about our intention and maybe get any
> information about some work in progresss of UBI related project?
>
> Has someone heard about a WinCe UBIFS version?
>
> What do you think about our project?
>
> Any suggestion will be welcomed.
>
> --
> Sidney Amani
>
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