Physical Security in Data Center is important. Monitoring Server rooms is important for the security of Data.
Do visit www.cradle.com/downloads.html
to find out more about enVigil.
Also you can see the limited live demo at - http://demo.cradlewatch.com/preview.html
Professional grade equipment where the video data travels over VPN is important and that is what enVigil offers.
Linux based system and with large storage available.