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[ts-7000] Re: TS-7260 yaffs2/NAND problem

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Subject: [ts-7000] Re: TS-7260 yaffs2/NAND problem
From: "Richard Williams" <>
Date: Thu, 23 Apr 2009 21:45:34 -0000
> > 
> > 
> > The log shows all blocks 814-1000 are unusable and some 39-104 unusable.
> 
> That would seem to correspond to the 21% usage you noted assuming yaffs is 
> reporting % of total size.
> 
> The question is whether these retired blocks are really fautly or whether 
> some bug or electrical defect has caused them to be marked as bad.
> 
> How old is this board and what root fs is it running? Is it still on factory 
> TS linux and kernel?
> 
> How much use did it get before you set up everything is tmpfs?
> 

It's running a cut down version of the oiginal rootfs that comes with the board 
and ts7400_tskernel-jul162008.tar.gz to get proper support for YAFFS2.

I've been running tmpfs right from the beginning so it hasn't been thrashed.

I have another unit that has been running the same software for a week and it's 
got this in the log which is a bit worrying. I get the same bad blocks 
mentioned each time I boot the board. Does this mean that there are only 3 bad 
blocks (312,878 and 110)? Why is block 110 be retired 50 times at each boot?

yaffs: dev is 7937 name is "1f:01"
yaffs: Attempting MTD mount on 31.1, "1f:01"
block 312 is bad
block 878 is bad
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
Partially written block 110 being set for retirement
VFS: Mounted root (yaffs2 filesystem).

Richard



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