Bad block table found at page xxx

wasp2k · Jun 2nd 2013

Dear F&S,

my brand-new armStoneA5 board from the first boot is showing me following bad blocks:

----
U-Boot 2011.12 (May 13 2013 - 15:04:56)

CPU: Freescale VyBrid 600 family rev1.1 at 0 MHz
Reset cause: <NULL>
Board: Vybrid
DRAM: 256 MiB
WARNING: Caches not enabled
board_init: using internal PLL.
NAND: 128 MiB
MMC: FSL_SDHC: 0
Bad block table found at page 65472, version 0x01
Bad block table found at page 65408, version 0x01
In: serial
Out: serial
Err: serial
Net: Link UP timeout
FEC0, FEC1
Hit any key to stop autoboot: 0
---

What those messages actually mean? BAD blocks of the NAND flash?
Is it OK to have brand new board with bad-block from the beginning?

Best Regards,

fs-support_HK · Jun 3rd 2013

First of all yes, it is completely OK to have a few bad blocks on a new board. However if the number of bad blocks is unnaturally high (e.g. more than 10), then I would say there is something wrong.

Second, the board just shows you that it has set up a table for bad blocks, i.e. an infrastructure to record bad blocks if any should come up. It has not said that it actually *has* any bad blocks.

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