ubifs error on DM37

Siva naga kishore Kampili

My hardware custom borad is designed based on omap2 board. The linux kernel is 2.6.37,root filesystem is ubifs. Most of time, the Linux run well. When i update the images in NAND by fastboot utility at U-boot, iam observing some UBUIFS errors like below.

UBIFS error (pid 1316): ubifs_check_node: bad CRC: calculated 0x7ea5373c, read 0x43437e35
[ 9.731018] UBIFS error (pid 1316): ubifs_check_node: bad node at LEB 201:27184
[ 9.738616] UBIFS error (pid 1316): ubifs_read_node: expected node type 1
[ 9.745697] UBIFS error (pid 1316): do_readpage: cannot read page 6 of inode 184, error -117
[ 9.755157] UBIFS error (pid 1316): ubifs_check_node: bad CRC: calculated 0x7ea5373c, read 0x43437e35
[ 9.764770] UBIFS error (pid 1316): ubifs_check_node: bad node at LEB 201:27184
[ 9.772399] UBIFS error (pid 1316): ubifs_read_node: expected node type 1
[ 9.779479] UBIFS error (pid 1316): do_readpage: cannot read page 6 of inode 184, error -117

This is observing when linux kernel mounting rootfs(ubifs).

Thanks in advance.

Kishore

over 10 years ago

0 Cvetolin Shulev-XID over 10 years ago

TI__Guru 65405 points

Hi Kishore,

The error messages could be caused by physical problems with the NAND memory or by incorrect calculation of the CRC due to some reason.

I would like to know:

1. Does the error messages appear each time when you update the NAND images or sometimes?

2. Does the page and inode index are always same? (Look at the following message: do_readpage: cannot read page 6 of inode 184, error -117)

3. Does the issue is tested on one board only?

Tsvetolin Shulev

0 Siva naga kishore Kampili over 10 years ago in reply to Cvetolin Shulev-XID

Intellectual 500 points

Hi Tsvetolin,

* Error messages does not appear always, but out of 5 times iam getting this issue 3 times.

* The page and inode index are always same, through entire error log.

* I am observing this issue on all of my boards.

BR

Kishore

0 Cvetolin Shulev-XID over 10 years ago in reply to Siva naga kishore Kampili

TI__Guru 65405 points

Kishore,
After reading the responses of my questions I think it is very possible the reason for the issue to be caused by physical problem with NAND chip.

BR
Tsvetolin Shulev

0 Siva naga kishore Kampili over 10 years ago in reply to Cvetolin Shulev-XID

Intellectual 500 points

Hi Tsvetolin,

How can we test the NAND chip? I know that we can test the NAND flash by enabling the MTD tests at kernel. Is it enough or is there any other way to do it?

BR
Kishore

0 Cvetolin Shulev-XID over 10 years ago in reply to Siva naga kishore Kampili

TI__Guru 65405 points

Hi Kishore,

The MTD tests are good starting point for NAND testing. Some of the test suits are more important for your issue. The mtd_stresstest test suit should be executed many times because it performs random read/write/erase operations and validates the MTD device I/O capabilities. Also after test complete it important to verify whether the problematic address has been checked.

Tsvetolin Shulev

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ubifs error on DM37