Bricked NAS540 boot loop because it could not load the kernel

potter91

Hello guys I have purchased for cheap a dead 540
I like to revive it and found this existing topic
https://businessforum.zyxel.com/discussion/7674/nas542-bootloop-after-debian-omv-get-a-new-firmware-solved

After some try & error I could get it booting the uImage.521 but the rootfs mount gets an error
After that I tried to insert a OMV usb and it boots

But I like to restore the default firmware first and get it working again before installing OMV to a SD card

@Mijzelf I hope you can help me and I appreciate you contributions
I have attached a serial log

Greetings from germany

Mijzelf

The kernel command line is incorrect. Yours is

[0.000000] Kernel command line: console=ttyS0,115200n8, init=/etc/preinit pcie_gen1_only=yes  mac_addr=00:0A:0B:0C:0D:0E,,

Here you can find a proper bootlog, and the command line is

[0.000000] Kernel command line: console=ttyS0,115200n8, init=/etc/preinit pcie_gen1_only=yes
 mac_addr=,, ip=dhcp root=ubi0:rootfs ubi.mtd=2,2048 rootfstype=ubifs rw noinitrd
mtdparts=spi0.0:256k(uloader)ro,512k(barebox)ro,256k(env);comcertonand:10M(config),10M(kernel1),
110M(rootfs1),10M(kernel2),110M(rootfs2),-(reserved) usb3_internal_clk=yes

The reason why your system doesn't boot is

ubiattach: error!: cannot attach mtd7
                      error 19 (No such device)
mount: unknown filesystem type 'ubifs'
NAND Flash Corrupt...
the sys-root image /dev/mtdblock7 is currupt !!

The partitions of the flash memory should be specified in the command line. On your box they aren't, and so the original firmware cannot mount partition 7. You'll have to play with barebox to get the right command line.

BTW, next time use a flat text editor like notepad to paste the bootlog. It's hard to read with rtf formatting.

potter91

@Mijzelf Thanks a lot now it boots again

I will made two firmware flash to be secure that both kernels are OK

Only changed one line and it works again
I am so happy thanks a lot

BTW, next time use a flat text editor like notepad to paste the bootlog. It's hard to read with rtf formatting.

I am using MobaXterm and .rtf is what it exports
But the forum did not allowed the .rtf extension.
So I thought it would be clear to remove the .txt