help about jffs2 write problem.

[nbhorse]

Hello everyone,
   I have a problem with the mtd and jffs2.when I ported a linux kernel(2.4.18 rmk7)to my arm 7212 board(samsung k9f560 32m nandflash),and my partition for nand mtd driver like this:

const static struct mtd_partition partition_info[] = {
	{ name: "kernel",
	  offset: 0,
	  size: 1*1024*1024},
	{ name: "blank",
	  offset: 1*1024*1024,
	  size: 1*1024*1024},
	{ name: "file system 1",
	  offset: 2*1024*1024,
	  size: 4*1024*1024},
	{ name: "SamSung flash partition 1",
	  offset: 6*1024*1024,
	  size: 2*1024*1024},
	{ name: "SamSung flash partition 2",
	  offset: 8*1024*1024,
	  size: 24*1024*1024 }
};
  and i want to mount partition 1(blank) with jffs2.
  I have a problem:
  I use "eraseall /dev/mtd1"(c 90 2) to erase the mtdblock1,and i "mount -t jffs2 /dev/mtdblock1 /flash","copy /bin/busybox /flash",it display following error message:
  
    ARGH. About to write node to 0x000f8760 on flash, but there's data already there:
0x000f8760: 57 a6 fb 05 76 e3 29 d7 fe f0 78 b7 ce 0f b8 c6
                       .....
then i run"/flash/busybox",error is:

Node CRC b04df10c != calculated CRC 49b35642 for node at 00020760
Node CRC b04df10c != calculated CRC 49b35642 for node at 00020760

I'm sure that partition 1（"blank") is be erased.

if i use ext2 filesystem,everything is ok.

Any help would be appreciated