hello to everyone. 
  
I have just bought my first dvr and I am very dissapointed. Firstly, I connected a hdd as a master one and a "no hdd" message appeared. Then I used the single mode and the dvr found the hdd. 
However, when I rec on the hdd, after 1 or 2 minutes a disk sccanning message appears and the dvr reboots. This continues and after the rebooting. 
the used hdd is Western Digital Caviar WD200BB. 
  
Can anybody help me? 
Thanks in advance.