Hi!
First of all, I feel like I should check, if the HDD I'm using is even supposed to work with the DNS-320.

I'm using the WD30EFRX, which doesn't seem to be officially supported according to
this thread in this forum. Whereas I bought the HDD based on information found in
this PDF from the D-Link homepage.
The bottom of my DNS-320 says: H/W Ver.: A2 F/W Ver.: 2.02
I didn't change that, no firmware upgrade applied, DNS-320 is new, just plugged the HDD in and powered up. Power LED kept blinking all the time and the WebUI menu wasn't accessible, however PING was successful all along. Neither shutdown button nor restart switch did have any effect at all.
DNS-320 without the HDD plugged in works fine.
Is that in any way similar to a known issue? At the moment, I'm trying to test the HDD in another computer, but I don't think, there's going to be a problem with that, because I bought two of them, none is working with the DNS-320 and I refuse to think both were DOA... just doesn't seem to be very plausible.
Nevertheless, I'm going to check them and in the meantime it would be great, if anyone had any suggestions for solving the problem.
Thanks, kind regards