mount jffs2 as rootfs and detect error:Magic bitmask 0x1985 not found

[liu.yaojin at zte.com.cn]

hi, everyone:

now i port uboot(1.1.6) and kernel(2.6.24.7) to my arm926 board.
here is my procedure to make a jffs2 fs and mount:
1,make jffs2 using mkfs.jffs2: "mkfs.jffs2 -r ./rootfs -o fs.jffs2 -e 
0x4000 -s 0x200 -n --pad=0x200000 -l"
2,use uboot to write the fs image,because i don't have enthernet!
nand erase 250000 20000
nand write.jffs2 21000000 250000 200000
3,boot the kernel with args: setenv bootargs 'mem=56M 
console=ttyS0,115200n8 noinitrd  root=/dev/mtdblock3 rootfstype=jffs2 rw'

now the errors happen:

//========================================
Creating 4 MTD partitions on "NAND 128MiB 1,8V 8-bit":
0x00000000-0x00040000 : "uboot"
0x00040000-0x00044000 : "params"
0x00050000-0x00250000 : "kernel"
0x00250000-0x00550000 : "filesystem"
mice: PS/2 mouse device common for all mice
mtd->read(0x3c0c bytes from 0x14c3f4) returned ECC error
mtd->read(0xdec bytes from 0x14f214) returned ECC error
Empty flash at 0x0014f210 ends at 0x0014f400
mtd->read(0x400 bytes from 0x150000) returned ECC error
jffs2_scan_eraseblock(): Node at 0x00150008 {0x1985, 0x2003, 0x00000008) 
has invalid CRC 0xffffffff (calculated 0x6b7c27e6)
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0015000c: 
0x0008 instead
mtd->read(0x3f80 bytes from 0x150080) returned ECC error
mtd->read(0x400 bytes from 0x154000) returned ECC error
jffs2_scan_eraseblock(): Node at 0x00154008 {0x1985, 0x2003, 0x00000008) 
has invalid CRC 0xffffffff (calculated 0x6b7c27e6)
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0015400c: 
0x0008 instead
mtd->read(0x3f80 bytes from 0x154080) returned ECC error
mtd->read(0x400 bytes from 0x158000) returned ECC error
jffs2_scan_eraseblock(): Node at 0x00158008 {0x1985, 0x2003, 0x00000008) 
has invalid CRC 0xffffffff (calculated 0x6b7c27e6)
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0015800c: 
0x0008 instead
mtd->read(0x3f80 bytes from 0x158080) returned ECC error
mtd->read(0x400 bytes from 0x15c000) returned ECC error
jffs2_scan_eraseblock(): Node at 0x0015c008 {0x1985, 0x2003, 0x00000008) 
has invalid CRC 0xffffffff (calculated 0x6b7c27e6)
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0015c00c: 
0x0008 instead
...........................
JFFS2 notice: (1) jffs2_build_xattr_subsystem: complete building xattr 
subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 
orphan) found.
mtd->read(0x70 bytes from 0x14f590) returned ECC error
mtd->read(0x8f7 bytes from 0x14f600) returned ECC error
JFFS2 notice: (698) check_node_data: wrong data CRC in data node at 
0x0014f590: read 0x6c371760, calculated 0x5f5283ad.
VFS: Mounted root (jffs2 filesystem).
Freeing init memory: 76K
Read of newly-erased block at 0x0015c000 failed: -74. Putting on bad_list
Read of newly-erased block at 0x00158000 failed: -74. Putting on bad_list
mtd->read(0x70 bytes from 0x146190) returned ECC error
JFFS2 notice: (1) jffs2_get_inode_nodes: Wrong magic bitmask 0x0000 in 
node header at 0x146190.
JFFS2 notice: (1) jffs2_get_inode_nodes: Wrong magic bitmask 0x0000 in 
node header at 0x146118.
JFFS2 notice: (1) jffs2_get_inode_nodes: Wrong magic bitmask 0x0000 in 
node header at 0x1460a0.
Read of newly-erased block at 0x00150000 failed: -74. Putting on bad_list
............................................
finally dead at:
mtd->read(0xf0 bytes from 0xdbb10) returned ECC error
JFFS2 notice: (1) jffs2_get_inode_nodes: Wrong magic bitmask 0x0000 in 
node header at 0x0dbb10.
Read of newly-erased block at 0x00170000 failed: -74. Putting on bad_list
mtd->read(0xec bytes from 0xda114) returned ECC error
JFFS2 notice: (1) jffs2_get_inode_nodes: Wrong magic bitmask 0x0000 in 
node header at 0x0da114.
Read of newly-erased block at 0x00168000 failed: -74. Putting on bad_list
mtd->read(0x21c bytes from 0xd87e4) returned ECC error
JFFS2 notice: (1) jffs2_get_inode_nodes: Wrong magic bitmask 0x0000 in 
node header at 0x0d87e4.
Read of newly-erased block at 0x00160000 failed: -74. Putting on bad_list
mtd->read(0xd4 bytes from 0x14f52c) returned ECC error
mtd->read(0x44 bytes from 0x14f52c) returned ECC error
(no more)

can anyone tell me what's the really matter causing this?
thanks.


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