The columns of the grid are:
This shows the physical disk number as used by Windows to distinguish between separate physical disks on a single controller.
A description of each disk discovered. This displays RAID details where applicable.
This will inform if the disk is SCSI or IDE.
Shows the capacity of the disk.
Shows the device properties for the disk.
Shows information reported from the disk and driver. In RAID configurations, the RAID level of a physical disk array is often stated here.
Shows the number of partitions on the disk.