I used instruction Getting Started with BPI-R4 - Banana Pi Wiki to burn image to onboard Nand but got
~# mtd erase /dev/mtd0
Unlocking /dev/mtd0 ...
Erasing /dev/mtd0 ...
Skipping bad block at 0x2680000
Skipping bad block at 0x28a0000
Skipping bad block at 0x28c0000
Skipping bad block at 0x28e0000
Skipping bad block at 0x2900000
Skipping bad block at 0x2920000
Skipping bad block at 0x2940000
Skipping bad block at 0x2960000
And sometimes it just hangs. I don’t think it is good, isn’t it?
After that, dd show errors too and of course it doesn’t boot from Nand
Any ideas or I have bad chip?