Akitio Mycloud Duo with 2015.10 U-Boot for Pogoplug V3 (OXNAS OX820) (2 replies)

Hello please help.

I try to flash new u-boot on Iconbit I-STOR IS608 clone of Akitio Mycloud Duo .
reboot after success flash u-boot:

U-Boot SPL 2013.10 (Apr 27 2014 - 19:08:27)
  Boot device: NAND
Attempting to set PLLA to 800 MHz ...
  plla_ctrl0 : 0000030a
  plla_ctrl1 : 00400000
  plla_ctrl2 : 007f0068
  plla_ctrl3 : 00000193

PLLA Set

And nothing happens. The device freezes.
I correctly understand that the image uboot.2015.10-tld-2.ox820.mtd0.img is written to the wrong place?

output of cat /proc/mtd:

-bash-4.0# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 10000000 00020000 "NAND 256MiB 3,3V 8-bit"
mtd1: 026c0000 00020000 "Boot partition"
mtd2: 0d940000 00020000 "Data Partition"

what am I doing wrong?