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Date: Fri, 12 Aug 2011 19:50:45 +0000
From: Nataraj S Narayan <nataraj@vaaraahi.com>
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To: linux-mtd@lists.infradead.org
Subject: Ubifs issues on Samsung Nand versus Micron
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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?

warm regards

Nataraj

~