Mikrotik RB751U-2HnD stays in netboot

Installing and Using OpenWrt
1

I installed OpenWrt 18.06.5 on a Mikrotik RB71U-2HnD using the common instructions and the 64MB NAND image.
The router restarts, but stays in netboot mode: ports 2-5 don't work, and on port 1 it tries (and does) BOOTP.
I checked /proc/mtd contents and I can only see 3 partitions: "booter", "kernel", "ubi", so rbcfg is not working (I wanted to see if the netboot thing was a configuration issue).
Right now, I can netboot anytime I want and the system is working, but it is not booting from NAND.
Any hints for solving this?

2

Have you loaded initramfs?

3

Yes, I loaded initramfs through BOOTP, then flashed the sysupgrade 64MB image using sysupgrade on ssh

4

Try manually: https://openwrt.org/toh/mikrotik/common#manually_flashing_openwrt

5

Disable it in the bootloader after the successful flash.

6

Turns out the kernel sees all sectors in the kernel partition as bad. I will see if it's real or if it's a software issue

1 Like
7

Hi, have you solved this and can share your solution, please?

8

Hi, no solution yet, bad sectors in NAND make it impossible to run the kernel

9

does netinstall, solves your issue? can you format the NAND again and install a new firmware?

10

Unfortunately to install OpenWrt I set boot mode to DHCP and netinstall runs only on PXE boot

11

Hi. Sorry my bad English.Use Netinstall 6.39 for firmware . It helped me to cure this problem.
https://download.mikrotik.com/routeros/6.39/netinstall-6.39.zip
https://download.mikrotik.com/routeros/6.39/routeros-mipsbe-6.39.npk

There is also a hole in the back to reset the bootloader, tp310

good luck