Re: UBIFS Corrupt during power failure

[Gilles Casse <list@gcasse.net>]

Artem Bityutskiy a écrit :
> On Wed, 2009-07-15 at 15:36 -0600, Eric Holmberg wrote:
>   
>> indeterminate state for the entire PEB.  Writing all zero's to the
>> header as in Artem's fix should work in all cases excluding the
>> extremely rare cases where a write of 0's is interrupted and the header
>> has been changed to a valid value and in the case where an erase
>> (0-to-1) transition is interrupted which results in a valid header.  The
>> odds against that are huge, so I would expect the flash to wear out
>> before it ever happens in real life.
>>     
>
> Hmm, we can zero out both headers completely by writing 128 bytes,
> even.
>
>   
According to a fellow electronician, Marc, offlist, it would not be safe
to force at 0 a bit already at 0 in flash.
For zeroing a byte, he recommends to write its complementary value (e.g.
if 0x85 is read then write 0x7A).

Best regards,
Gilles