Error in buffer data for NAND flash write, read on OMAP3430SDP.

Hi,

I am using NAND Flash write, read APIs for writing and reading of my data to/from the same block.

[SNIP]
OMAP34XX SDP # nand dua//I created this command
The manufacturer id = 2c
device Id = a1
Erasing at 0x180000 -- 101% complete. Cleanmarker written at 0x180000.
ERASE OK
Writing data at 0x19f000 -- 100% complete.
WRITE OK
Reading data from 0x19f000 -- 100% complete.
READ OK
OMAP34XX SDP #

But when I compare write buffer and read buffer,some of the data is not matching(read data is different from write data).

Could some one tell me the solution for this.

Regards,
Krishna.