Need Help

Hi guys. I'm freaking out lol. Last night I relocated my mixing desk to another location about 15 feet away. I unplugged everything (see my specs). I moved everything, and plugged it all back in. We're in the process of mixing our album which by the way was glitch free. So I fire up our first song that we're mixing, I hit play on my Mackie MCU, there is about a 3 second delay, and the song starts,  my system disk meter (producer 8.5) spikes to red, and after several seconds I get a red message box at the botton of the console that says dropout. I defrag both my system drive and my audio drive, both are seagate 7200rpm 1 tb sata drives. Doesn't help.
I can hear a drive clicking when booting, it appears to be my system drive thats clicking.
 
I went out tonight and bought another seagate 7200 500gb hard drive. Any thoughts before I undertake this? Could my system drive (operating system, sonar) cause this issue? or would it be my audio drive? Thanks in advance 

check disk has made a little progress.

Glad you got it sorted!!!