Western Digital (WD) today announced its first new enthusiast-oriented VelociRaptor hard drive (HDD) in nearly two years with the launch of the 450GB and 600GB capacity drives this morning. These new drives not only double the capacity available for this 10,000 RPM enterprise storage drives, but they also introduce support of the SATA 6Gbps interface and increase the drives' cache from 16MB to 32MB!  Thanks to these specification improvements the VelociRaptor has doubled in storage space and has gained roughly 15% in overall drive performance compared to the VelociRaptor WD3000GLFS 300GB hard drive that we reviewed in April 2008 here.  To make top it all off we are told that the new drives consume no more power than the previous generation WD VelociRaptor! Today, we have the WD VelociRaptor 600GB (WD6000HLHX) IcePack Hard Drive and we'll be taking an in-depth look at the drive's features and the performance of the drive compared to the previous generation VelociRaptor HDD and other popular SSDs.