Situation:
No HDD in slot 1. HDD plugged into slot 2 and recording properly but not yet filled.
Plug empty HDD into slot 1, DNR buzzes wildly and reads from HDD slot 1 and ignores HDD slot 2.
The firmware is not "smart" enough to continue writing to HDD slot 2 before using HDD slot 1.
Please fix this problem. DLINK can do their own testing if they desire to. Customer reports problems and not responsible to prove existence when already experienced and as a courtesy relayed to DLINK via DLINK proxy board.