Problem to attach NAND MTD-device to UBI

["Kaius Häggblom" <kaius@oliotalo.fi>]

Hi.

I'm developing on an embedded arm (AT91) platform, on which I have had 
successfully Linux 2.6.22 and 2.6.25 kernels running for a long time in 
production. As I have had some JFFS2 failures on NAND in the field and 
I'm now updating to a 2.6.29 kernel I want to try ubifs on the NAND to 
see if it would bring an improvement.

I have the kernel running and ubi-tools compiled and installed. I have 
tested that NAND still works OK with JFFS2 with the new kernel. It's a 
256MiB NAND in two partititions:
NAND device: Manufacturer ID: 0x2c, Chip ID: 0xda (Micron NAND 256MiB 
3,3V 8-bit)
0x000000000000-0x000008000000 : "NAND_Flash 1"
0x000008000000-0x000010000000 : "NAND_Flash 2"

Now the problem is that I cannot get the mtd-devices attached to ubi. 
The error is different depending on if I try to use ubiformat, or if I 
try to attach an empty device directly.

WITH UBIFORMAT
=============

# flash_eraseall /dev/mtd5
Erasing 128 Kibyte @ 5aa0000 -- 70 % complete.
Skipping bad block at 0x05ac0000
Erasing 128 Kibyte @ 7fe0000 -- 99 % complete.

# ./ubiformat /dev/mtd5
ubiformat: mtd5 (NAND), size 134217728 bytes (128\x030 MiB), 131072 
eraseblocks of 131072 bytes (128\x030 KiB), min. I/O size 2048 bytes
libscan: scanning eraseblock 1023 -- 100 % complete 
ubiformat: 1023 eraseblocks are supposedly empty
ubiformat: bad eraseblocks: 726
ubiformat: formatting eraseblock 1023 -- 100 % complete 

# ubiattach /dev/ubi_ctrl -m 5
UBI: attaching mtd5 to ubi0
UBI: physical eraseblock size:   131072 bytes (128 KiB)
UBI: logical eraseblock size:    129024 bytes
UBI: smallest flash I/O unit:    2048
UBI: sub-page size:              512
UBI: VID header offset:          512 (aligned 512)
UBI: data offset:                2048
UBI error: validate_ec_hdr: bad VID header offset 2048, expected 512
UBI error: validate_ec_hdr: bad EC header
UBI error: ubi_io_read_ec_hdr: validation failed for PEB 0
ubiattach error: cannot attach mtd5
error 22 (Invalid argument)

DIRECTLY ATTACHING EMPTY DEVICE
===========================
 # flash_eraseall /dev/mtd4
Erasing 128 Kibyte @ 380000 --  2 % complete.
Skipping bad block at 0x003a0000
Erasing 128 Kibyte @ 71e0000 -- 88 % complete.
Skipping bad block at 0x07200000
Erasing 128 Kibyte @ 7bc0000 -- 96 % complete.
Skipping bad block at 0x07be0000
Erasing 128 Kibyte @ 7fe0000 -- 99 % complete.

# ubiattach /dev/ubi_ctrl -m 4
UBI: attaching mtd4 to ubi0
UBI: physical eraseblock size:   131072 bytes (128 KiB)
UBI: logical eraseblock size:    129024 bytes
UBI: smallest flash I/O unit:    2048
UBI: sub-page size:              512
UBI: VID header offset:          512 (aligned 512)
UBI: data offset:                2048
UBI: empty MTD device detected
UBI: create volume table (copy #1)
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 0:512, 
written 0 bytes
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 1:512, 
written 0 bytes
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 2:512, 
written 0 bytes
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 3:512, 
written 0 bytes
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 4:512, 
written 0 bytes
UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 5:512, 
written 0 bytes
ubiattach error: cannot attach mtd4
error 5 (Input/output error)


Any suggestions or ideas anyone?

kind regards,
kaius