Re: [question]MTD:unstable bit issues?

hejianet
2012-10-24T09:21:33Z

Hi Thomas
till now, we have no evidence that it is a jffs2.
we only observed a ubi error msg(not 100% sure it caused this hole):

Oct 15 20:09:10 (none) kernel: UBI error: ubi_io_write error -5 while writing 2048 bytes to PEB 1663:20480, written 0 bytes

Besides, it only appeared in power-cut stress cut, so I suspect it is relevant
to "unstable bits issue". from google information, this issue appears in both
nand and nor flash, but more frequently in nand.

On 2012-10-24 17:01, Thomas.Betker@rohde-schwarz.com wrote:
> Hello Jia:
>
>> Yes, we use jffs2.
>> How did u solve your bug? :)
>>>> -----------------------------------------------------
>>>> 2)a 4k bytes hole with all 0 in the flash file.
>>>> -----------------------------------------------------
> Unfortunately, we didn't solve it. Some day, it was simply gone; I have no
> idea what had changed. I couldn't reproduce it anymore, so I couldn't do
> any further analysis.
>
> Anyway, most likely this is not a NAND issue or MTD issue, but a JFFS2
> issue. And I would certainly want to hear about it if you manage to find
> and fix it ...
>
> Best regards,
> Thomas
>
>
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