Right-click the my computer icon in the OS and choose “manage”. Look at the disk management and see if the space is showing there. You might need to use <a href=”http://support.microsoft.com/kb/325590″>diskpart</a> to get the space to show in the OS.
Utilizing the HP Array Configuration Utility, you should be able to see all the drives straight from the server hardware. There I would do the modification of the array if needed here. Then if the utility sees it, then you go within “Computer Management”. Then go to “Disk Management” and right-click and then select “Rescan Disks”. It should now show up within this interface.