Kernel panic - error on x86. RouterOS doesn't start

Hi,
I have built a new x86 server and I’d like to use an HD that was previous installed on an obsolete server (with a Level 6 license).
RouterOS has started only one time (the first boot), but after a system reset-configuration it stop at boot with this error:
“Loadin system with initrd
mknod: 00000002
execve: 00000002
Kernel panic - not syncing: Attemted to kill init!”

Thats all… Any idea?

MoBo: ASRock H55M-LE
CPU: i3-540 LGA 1156
RAM: 4GB Kingston
RouterOS 4.16

Thanks for now…

It could be that you did not set HDD poperly in BIOS and on first disk wirte it damaged contents. I meet with this few times.

The cue is usualy to slow down HDD connection by lowering LBA mode in BIOS or whatever is suitable for specific disk.

I am not sure how to recover. I guess Netinstal could help but the best would be to contact Mikrotik support and ask for advice.