The Erase Disk task lets you erase a disk to reallocate the hardware. You can either delete the partitions of the disk, erase the system disk, or configure the task to erase all the disks. The Erase Disk task does not operate on any disk that is connected through an USB or through an FireWire interface.
You access the Erase Disk task from Manage > Jobs and Tasks menu. In the Jobs and Tasks window, expand System Jobs and Tasks and right-click Deployment and Migration > New > Task option. In the Create New Task dialog box, access Deployment and Migration > Erase Disk.
Table: Erase Disk task
See Erasing a Disk