Disk
A disk is a mass storage device attached to the system.
Use the 
icon on the System Architecture Diagram tab to
add a disk to the diagram, or you can drag and drop a disk from the dictionary.
icon on the System Architecture Diagram tab to
add a disk to the diagram, or you can drag and drop a disk from the dictionary.When you have added a disk, you can change it both via the diagram using the disk Property pages and the context menu.
To describe its size and speed, you attach a
disk type to the new disk through the Options tab of the disk's Property pages.
Use the 
icon on the System Architecture Diagram tool bar to
link items to a disk.
icon on the System Architecture Diagram tool bar to
link items to a disk.