[BPI-R4] Boot from NAND fails

[starsuni]

Thanks Frank, let me try and reply later today

[ericwoud (Eric W.)]

@Rup

Skipping bad block at 0x05ba0000
Skipping bad block at 0x05bc0000
Skipping bad block at 0x05be0000
Skipping bad block at 0x05c00000

This is a bit old, but anyway, you can always ‘reset’ bad blocks with the linux flash_erase --noskipbad command. Sure U-Boot can do the same with a different command.

Then try writing again. If it was marked bad for another reason then really a bad block (uncomplete unmount of ubifs or power cut maybe), it may work again.

[Rup]

Thanks for info, I will try it

btw: NAND is working right now, even without UBI. When i wrote here about the bad blocks, I did not know that there is tolerance for bad blocks in NAND. Thanks for smarter people here, I learned a lot.

[ericwoud (Eric W.)]

@ericwoud

flash_erase --noskipbad

But first do:

cat /sys/kernel/debug/mtd/expert_analysis_mode
echo Y > /sys/kernel/debug/mtd/expert_analysis_mode
cat /sys/kernel/debug/mtd/expert_analysis_mode