Hi, thanks for you answer. I saw yesterday after my post the process with nanoboot to update to 5.0-4528 and 5.1-5004, so as you say I could update to 5.0-4528 with the option install/update of nanoboot and after update with sed to 5.0-4528 update 2. It work perfect.
I tryed with 5.1-5004 too, but although I could upgrade, I have the problem with the volumes, this is the result:
Post init
Init: Unable to mount /dev filesystem: No such device
===== Start udevd ======
===== Trigger device plug event =====
And in DSM I not have any volumes to create.
Regards