NAND Flash UnCorrectable RS-ECC Error on the iMX35

[jdeg]

I am getting the following error with Linux on an iMX35 system:

UBI error: ubi_io_read: error -74 while reading 64 bytes from PEB 1654:0, read 64 bytes

UnCorrectable RS-ECC Error

The NAND flash is a Samsung K9K8G08U0E-SIB0000 which is a die shrink of the K9K8G08U0D-SIB0000 part that works fine.  The specifications between the two parts are nearly identical.

[afalt]

Hello,

How i can change NOP in driver? i can't find NOP in driver. Please help me.

I am using kernel 2.6.33 from freescale bsp 1.5

Regards

[jdeg]

There was another couple of problems here that need to be fixed.

- The UBI file system need to be rebuilt

- The UBI raw binary file system image need to rebuilt

- There is a hard coded value associated with the NAND subpage write in the nand_ids.c file (linux/drivers/mtd/nand in the 2.6.26 kernel)

  I added the macro "NAND_NO_SUBPAGE_WRITE" to the 0xD3 NAND id.

[KursadOney · Accepted solution]

Not sure if this is the same thing but there's a similar U0D -> U0E transition for another Samsung part that went from allowing 4 NOPs to 1 NOP. NOP = Number of Partial Program Cycles. Check if that's the same thing for you, and if that's the case you can change the driver not to use partial programming.

[jdeg]

Awesome!  Thanks for your help here.  I went back and looked at the specification for both the rev D and rev E parts. I confirmed that the U0D part has 4 NOPs and the U0E part has 1 NOP.  I rebuilt the UBI file system image(mkfs.ubifs) and the UBI raw NAND binary image(ubinize) with the sub-page size set equal to the page size(2048) and the error moved.  The kernel is reporting a sub-page size of 512B.  Is there something in the kernel code that has this NAND flash part hard coded to a 512B sub-page size?  Below is the output from the console window:

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 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

UBI error: ubi_init: cannot attach mtd4

UBI error: ubi_init: UBI error: cannot initialize UBI, error -22