DVR Can't see hard drive

Hi

I've recently bought a new Kare DVR and have inherited a 500GB Western Digital hard disk to go in it. In either the Hard Disk Info or Advanced Hard disk settings the HD doesn't appear. When the power cable is plugged in it whirs up fine and have tried using a data cable out of an old DVR just in case there were any issues with that but still a big blank.

I've plugged the hard disk into a docking station that connects to my PC and it's showing as 454GB Healthy Partition in Disk Management though it hasn't got a drive associated with it and right clicking it all the options are greyed out apart from 'Delete Volume'. So should the hard disk be ok in people's opinion. I've included a screenshot from disk management

thanks in advance

have inherited a 500GB Western Digital hard disk

Hi. That will be your problem

Why not just buy a new HDrive and let your unit format it ... Which is the right way