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Re: Developer board for NetBSD flash file system development
I probably have a few other boards you could try. I can get you any
board from our product line for free-- I'd really like to see a flash
filesystem developed for NetBSD. In fact, I have a prototype board
with a dual core 650Mhz ARM11 I just bootstrapped NetBSD support for
but haven't yet commited to CVS.
It is very big help for us, if you can provide us ARM developer
board(s). The exact type of it/these is almost the same for us, the
bigger its NAND flash size the happiest we will - and certainly good
Be aware of some of the details of the different NAND chips, there are
512b sector chips, 2k sector chips, and 4k sector chips. Each also
have different erase block sizes and different requirements for ECC
(MLC vs SLC, reed-solomon vs. hamming codes). My strategy lately is
to just create a simple high reliability block layer and run regular
old filesystems on top of it-- I'd like to hear more about your plans.
At this moment we are (almost) ready with:
- a flash layer: it is similar to MTD
- a wear-leveling layer: it is similar to UBI
We are strongly working on a JFFS2 like flash file system. Almost all
directory functions work, now working on file read/write. At this moment
it is based on UFS, but considering to ignore it in the future.
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