[Yaffs] Re: [YAFFS1] Some bits are changed - systematically

[Martin Egholm Nielsen]

Hi Ian,

I take to the list - who knows if somebody might read this one day...

Ian McDonnell wrote:
 >>>>I'm sure Charles will ask for this when he wakes up in New
 >>>>Zealand...
 >>I guess not :-)
 > Yes, he is very quiet isn't he.
:-)

 >>Can I enable some flags in the YAFFS core enabling some debug
 >>information that'll help me investigating this problem?
 >>I guess what I want is to have a list of nodes stating what
 >>nodes belong to what file and when the node was written...
 > Can you reproduce the problem?  Does the corruption hit the same
 > file?  Is it similar in other files?  Do you know it's not a NAND
 > or MTD problem -- i.e a corrupted write or a bad device.  Have
 > you seen this problem on other instances of the h/w. etc.
That's the only device I've seen it with - out of 20-30 pieces having 
had the same "treatment" :-)
And no I haven't tried that device any more - I didn't want to ruin the 
possibility to analyse what has happened...

And I don't know if it's a NAND or MTD problem - I was hoping that some 
could guide me...

Can this occur, say, with a bad NAND? Would YAFFS/MTD puke up with a lot 
of checksum errors?

Best regards,
  Martin Egholm