Hello all,
I have tested two scenarios for writing/reading a data on my nand flash and it act's differently the nand driver on DM6446.
1st scenario:
I booted my board with NFS, mounted my nand flash partition manually mount -t jffs2 /dev/mtdblock11 /mnt
Then, I put data on nand partition by copying the following directories (/bin /lib): cp -daR /bin /lib /mnt
I unmounted and remounted it and I didn't get any errors/warnings, even I try many times.
2nd scenario:
I erased the said partition using flash_eraseall -j /dev/mtdblock11, write the .jffs2 image on flash using nandwrite. Then, I reboot my board to boot on nand. The first boot, I didn't get any errors/warnings. But, after the 2nd reboot, I got the following errors:
mtd->read(0x7b74 bytes from 0x2a9848c) returned ECC error Empty flash at 0x02a9cea4 ends at 0x02a9d000 jffs2_scan_dirent_node(): Name CRC failed on node at 0x02a9d4b8: Read 0x87ca3075, calculated 0x9a7d2011 jffs2_scan_dirent_node(): Name CRC failed on node at 0x02a9e198: Read 0x1c93832c, calculated 0x1947e8af jffs2_scan_dirent_node(): Name CRC failed on node at 0x02a9e660: Read 0xb08c7dea, calculated 0x7855f7e2 jffs2_scan_dirent_node(): Name CRC failed on node at 0x02a9eb2c: Read 0x06400c2b, calculated 0x06400c29 jffs2_scan_dirent_node(): Name CRC failed on node at 0x02a9faec: Read 0xa532c097, calculated 0x6e6e1332
Why it acts so differently the two scenarios, since I'm using same driver?.
Does booting on nand, the driver should behave differently?. Am I missing something or is there any special cases that I need to do on nand?
Any help would be appreciated.
Thanks,
John