mount_ubifs: failed to mount ubifs

[Bean Huo 霍斌斌 (beanhuo)]

>> Hello:
>> Currently ,I mainly focus on ubi powerloss solution for MLC nand ,now 
>> I Have a problem about master node, below is log.
>>
>> When PEB 354:4096 read failed,and ubi will regard this block a corrupted block.
>> Ubi will not recover it, but reserve it.
>> Maybe this block contains master node, so will mount failure?

>UBI does not expect that a block turns bad/unreadable all of a sudden.

>> Why ubi not try to recover such block?

>How would it? If there is an ECC error UBI cannot do much.
This is a question,so need us to do it.

>The more interesting question is, why went it unreadable?
Maybe this page be damaged by a sudden powercut.
>You said this is MLC nand, UBI was designed for SLC.
>MLC is still unsupported, especially if you need to deal with powercuts.

Yes, I am just doing a solution about UBI powerloss for MLC nand.

>As you work for Micron, it would be wonderful if you could give us more details on the MLC nand and what Micron recommends to deal with that.

So far, I am also little know about ubifs. But for MLC nand,maybe I can give you some helpful infor.

>--
>Thanks,
>//richard