On 06-07-24 10:13 +0800, fs p wrote:
>    Hi:
>    I have a problem :
>    when my kernel mount the rootfs (yaffs 1 ),there are many yaffs ecc error:
> 
>    [42949455.170000] **>>yaffs ecc error unfixed on chunk 1741:0
>    [42949455.180000] **>>yaffs ecc error unfixed on chunk 1741:1
>    [42949455.180000] **>>Block 54 marked for retirement
>    [42949455.190000] **>>yaffs ecc error unfixed on chunk 1742:0
>    [42949455.190000] **>>yaffs ecc error unfixed on chunk 1742:1
>    [42949455.200000 ] **>>Block 54 marked for retirement
>    [42949455.200000] **>>yaffs ecc error unfixed on chunk 1743:0
>    [42949455.210000] **>>yaffs ecc error unfixed on chunk 1743:1
>    [42949455.210000] **>>Block 54 marked for retirement
>    [42949455.220000] **>>yaffs ecc error unfixed on chunk 1744:0
>    [42949455.230000] **>>Block 54 marked for retirement
>    [42949455.230000] **>>yaffs ecc error unfixed on chunk 1745:0
>    [42949455.240000 ] **>>yaffs ecc error unfixed on chunk 1745:1
>    [42949455.240000] **>>Block 54 marked for retirement
> 
>    .....................
> 
>    this error message is printed by
>    yaffs_ReadChunkFromNAND(yaffs_tagscompat.c) ,yaffs_Scan call this
>    function.
>    I mount the root as yaffs ( my flash chip is 512B page ,kernel 2.6.12
>    ,yaffs2 source ),
>    so I think whether yaffs1 tag compatible with the yaffs2 cource I use?

Hmm, the yaffs1 compatibulity mode in the yaffs2 source is fine in
general - many people have been using it for a long time. The error
message probably means that there is something wrong with the
data that are being written or read from the OOB so there appear to be
ecc errors. What sort of ECC are you using? calculated by YAFFS,
calculated by MTD or done in hardware? YAFFS and MTD need to agree
with each other, and hardware and any bootloaders that write flash
images on OOB layout and ECC policy.

Are you using current yaffs2 CVS? This has the patch to arrange tags
so they should work with kernel 2.6.12 (I think) so I'm not sure
what's wrong. 

I'd turn on debug and see if that gives any clues. Check out the
YAFFS_TRACE defines and set yaffs_traceMask in yaffs_fs.c for the ones
you want.

Wookey
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