I have an RPI 2 Model B. I just started to use it. I am connecting to it using SSH. I have an internal HDD and also a dock. The dock has it's own power source and transmits the data from the HDD to a computer using an USB cable. When I connect it to my RPI, it works great, but after a time the PI stops responding. It doesn't even answer to PING.
Can you point me to the right direction on how to start discovering the problem?
Is there any log files for these cases? I've verified all the logs in the
/var/log folder, but there was nothing about this error.