[Yaffs] partially written block detected

Hi,

 I am seeing the below errors with    2 GB SLC  nand flash chip. Any 
pointers.

Thanks,
Ramprasad.
Partially written block 1907 detected

<4>Partially written block 1907 detected
<4>Partially written block 1907 detected
Partially written block 1907 detected
<4>Partially written block 1907 detected
<4>Partially written block 1907 detected
Partially written block 1907 detected
<4>Partially written block 1907 detected
<4>Partially written block 1907 detected
Partially written block 1907 detected
List of all partitions:
List of all partitions:
List of all partitions:
1f00        256 mtdblock01f00        256 mtdblock01f00        256 mtdblock0 (driver?)
 (driver?)
 (driver?)
1f01        256 mtdblock11f01        256 mtdblock11f01        256 mtdblock1 (driver?)
 (driver?)
 (driver?)
1f02       2048 mtdblock21f02       2048 mtdblock21f02       2048 mtdblock2 (driver?)
 (driver?)
 (driver?)
1f03      30208 mtdblock31f03      30208 mtdblock31f03      30208 mtdblock3 (driver?)
 (driver?)
 (driver?)
1f04    1048576 mtdblock41f04    1048576 mtdblock41f04    1048576 mtdblock4 (driver?)
 (driver?)
 (driver?)
1f05    1048576 mtdblock51f05    1048576 mtdblock51f05    1048576 mtdblock5 (driver?)
 (driver?)
 (driver?)
No filesystem could mount root, tried: No filesystem could mount root, tried: No filesystem could mount root, tried:  yaffs yaffs yaffs

<0>Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,4)
<0>Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,4)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,4)