[U-Boot-Users] NAND and JFFS2

Ulf Samuelsson ulf at atmel.com
Wed May 23 13:56:04 CEST 2007

Matt Gessner skrev:
> Hi, all,
> I'm using 1.2.0 on an AT91RM9200, along with linux 2.6.20-2 w/ patches
> from Maxim.
> I'm looking for info on how compatible the JFFS2 stuff is between u-boot
> and linux.
> When I mount a partition (I have JFFS2 debugging turned on in the
> kernel), I get two kinds of error messages:
> 	"jffs2_check_nand_cleanmarker(): Cleanmarker node not detected
> in block at X"
> 	"OOB at X was ...."  (lots of data, not all FF)
> 	"CLEANMARKER node found at X has totlen 0xc != normal 0x0"
> OR
> 	"jffs2_check_nand_cleanmarker(): Cleanmarker node not detected
> in block at X"
> 	"OOB at X was ...."  (lots of FF)
> I'm wondering if anyone can point me to what I'm doing wrong.
> I have 3 partitions: boot, backup and config, which I made using
> mtdparts.  When I work with my nand device, I use 'nand erase clean',
> which I thought would write the nand clean markers.  The jffs2 is
> expecting nand clean markers at every 4K (0x1000) bytes.
> I'm wondering if my mkfs.jffs2 command is wrong, or if my use of nand
> erase is wrong, or if I need to specify something in either the kernel
> or the u-boot config is wrong.

Extract from www.at91.com forum post:
"When using NAND make sure to pass the -n option to mkfs.jffs2 when creating the image.
Otherwise you will get errors about the cleanmarkers when you mount the filesystem"

> Any pointers are appreciated.
> Thanks for everyone's hard work making u-boot a great tool.
> Regards,
> Matt G.
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Best Regards,
Ulf Samuelsson
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