We have performed several software upgrades on our RB1100AH, after each system... restart, it does not come back online, and has required a power cycle to bring it back. We did the most recent installation of ROS5.5 today, and had a console port plugged in to watch if there was any indication of a problem.
Again, after system... restart, the RB1100AH did not come back online, with "Restarting system" being the last message on the console. After a power-cycle, the router comes back with the new ROS just fine.
Here is the output of the console during the upgrade...
> system reboot
Reboot, yes? [y/N]:
system will reboot shortly
(STOPS HERE AND REQUIRES POWER CYCLE)
RouterBOOT booter 2.30
CPU frequency: 1066 MHz
Memory size: 2048 MB
Press any key within 2 seconds to enter setup..
loading kernel from nand... OK
setting up elf image... OK
jumping to kernel code
mount: Mounting ubi0:Kernel on /boot failed: No such device
/system routerboard pr