issues with Nand tests

[Ram]

Hi,
Im testing nand device using fs-tests package that comes with mtd-git.
I am using linux 2.6.23.

Right now, i am facing a few issues, i would appreciate your advice in
this regard.

!) All the the tests passes except that the stress test ./stress00.sh
throws up the message as shown below.
during the test, However the test passes successfully.

mtd->read(0x3c8 bytes from 0x59725c) returned ECC error
Data CRC failed on REF_PRISTINE data node at 0x0059725c: Read
0x32e9ab7f, calculated 0xb1b6afa0
mtd->read(0x3dc bytes from 0x597764) returned ECC error
Data CRC failed on REF_PRISTINE data node at 0x00597764: Read
0x70c076f0, calculated 0x2d5d9d38
mtd->read(0x99c bytes from 0x59849c) returned ECC error
Data CRC failed on REF_PRISTINE data node at 0x0059849c: Read
0xa2908a1a, calculated 0x364b837f
mtd->read(0x1044 bytes from 0x598eb4) returned ECC error
Data CRC failed on REF_PRISTINE data node at 0x00598eb4: Read
0xb882b629, calculated 0x5e66e5b0
mtd->read(0x1044 bytes from 0x599ef8) returned ECC error
Data CRC failed on REF_PRISTINE data node at 0x00599ef8: Read
0x8819eb58, calculated 0x83e2d097
mtd->read(0x1044 bytes from 0x59af3c) returned ECC error
Data CRC failed on REF_PRISTINE data node at 0x0059af3c: Read
0xe9c03ff1, calculated 0xd85bc634
mtd->read(0x1044 bytes from 0x59bf80) returned ECC error
Data CRC failed on REF_PRISTINE data node at 0x0059bf80: Read
0xebcbe14f, calculated 0xa3f6ce10
mtd->read(0x1044 bytes from 0x59cfc4) returned ECC error
Data CRC failed on REF_PRISTINE data node at 0x0059cfc4: Read
0xd8533cde, calculated 0x5130dbf6
mtd->read(0x1044 bytes from 0x59e008) returned ECC error
Data CRC failed on REF_PRISTINE data node at 0x0059e008: Read
0xe6f84772, calculated 0x30f06f3d


My question is what can one conclude on the above - can i say the nand
drivers/linux mtd are working
perfectly!. -;)

How does one isolate the problem of this nature since all the tests
are passing except for the
occasional ECC error.

2) My 2nd question is regarding the time taken for running

 Each run of all the tests take more than 6 hours to complete to test
a partition of 16MB.
 All the tests run only once, (repeat count is 0) and -z (size
parameter is 0 that is
 all the test fills the file system until there is no space left.)

The clock to the nand device is around 125MHZ.

 I observe that the "test processes" keep oscillating between "-D"
(uninterruptible sleep) and -R (Running)
 during the course of the test.

 When i do a ls -Rl on the test partition, i observe that the output
is not continuous, It stops intermittently
  and then continous.

 Is this normal behaviour.

Thanks and Regards,
  Sriram