This Windows Home Server Add-In is an extension of the standard WHS Server Storage interface. People who buy nice OEM WHS solutions get fancy LEDs that light up when a disk needs to be removed; us poor people with cobbled-together home-brew hardware don't. This add-in makes it easier to identify the physical disk you're working with in the WHS Console.
Select one of the disks, or expand the columns after the disk ID, to see infomation about the disk. It takes awhile to render because it's doing a WMI crawl to find the disk controller. You get SCSI bus/port/LUN, plus disk controller. That's useful information if you know which port is which on your SCSI/SATA controller.
For support, join the Microsoft Windows Home Server forums and post here.
Tentacle Software: Windows Home Server Disk Management Add-In