jffs2 magic bitmask error occurs

Hi,

We are able to mount file system successfully but we are facing the below mentioned jffs2 errors while booting up.We have the same erase size in kernel and rootfs.We have erased the flash,flashed the jffs2 image and then rebooted the board.The following error appears.

NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
rtc-at91sam9 at91_rtt.0: hctosys: unable to read the hardware clock
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100bc: 0xc000 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100c0: 0x0804 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100c4: 0x0008 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100c8: 0x0800 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100d0: 0x0040 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100d4: 0x2804 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100d8: 0x210c instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100dc: 0x4240 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100e0: 0x0040 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00b100e4: 0x0508 instead
Further such events for this erase block will not be printed


We are using AT91SAM9G20(ARM) and linux kernel 2.6.27.We have used buildroot to create the jffs2 image.Nand flash is micron MT29F1G16AB with 16-bit bus width.

Regards,
Packiam