I am new to Rockstor. I have installed the system on a NVMe SSD drive which is connected using a PCIe adapter card. The motherboard does not support booting from such a configuration so I used a USB flash drive to hold the /boot partition with everthing else on the SSD drive. The installation went fine and the system booted successfully using the flash drive as the boot device. I was able to connect to the web interface and everything looked fine.
The problem occurred when I tried to upgrade Rockstor from the stable repository. The upgrade went OK but when the system booted, the kernel panicked because it could not mount the root file system. Evidently one of the boot files did not get updated properly because of my unique configuration. Can anyone give me assistance for correcting this problem?