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Date: Fri, 12 Aug 2011 17:27:01 +0200
From: Matthieu CASTET <matthieu.castet@parrot.com>
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To: Nataraj S Narayan <nataraj@vaaraahi.com>
Subject: Re: Ubifs issues on Samsung Nand versus Micron
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Nataraj S Narayan a écrit :
> Hi
> 
> Using Samsung Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB
> 3,3V 8-bit), on at91sam9263 board, with Arm-linux.
> 
> Getting the following errors intermittently:-
> 
> 
> UBI error: ubi_io_read: error -74 (ECC error) while reading 129024 bytes
> from PEB 517:2048, read 129024 bytes
> usb 1-1: new full speed USB device number 2 using at91_ohci
> UBIFS: recovery needed
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> uncorrectable error :
> UBI error: ubi_io_read: error -74 (ECC error) while reading 106496 bytes
> from PEB 782:2048, read 106496 bytes
> UBIFS error (pid 1): ubifs_recover_leb: LEB 225 scanning failed
> VFS: Cannot open root device "ubi0:root" or unknown-block(0,0)
> ~
> 
> 
> Same issue when on kernel 2.6.30 and also on "commit
> d6c9836c1114242aa89ea228bb1c43c17752b76c" of  ubifs-2.6.
> 
> I don't have the said problem with Mircon Nand.
> 
> Please help to find a solution to this issue. Is it the nand driver
> which is the culprit?
> 
Are you sure your timming are correct ?

Try to see if you reproduce the problem with slower timming.


Matthieu