Hi I use od command get mac address from flash. CURRENT od command change behavior. OLD od # od -j 0x0004 -N 6 -t x1 /dev/flash/spi0s.u-boot-env 0000004 00 18 84 12 34 56 0000012 CURRENT od # od -j 0x0004 -N 6 -t x1 /dev/flash/spi0s.u-boot-env od: /dev/flash/spi0s.u-boot-env: Invalid argument 0000004 Is this bug? Hiroki Mori