The correct location is Media and Device Management > Device Monitor > Disk Pools. In NetBackup, the Devices > Disk Pools view is primarily used to view configured disk pools, manage disk-pool properties, delete disk pools, or perform inventory-related actions. It is not the operational monitoring location used to change the runtime state of a disk pool. Cohesity documentation distinguishes the disk-pool management view from state monitoring; for example, it states that disk pool state is UP or DOWN and that the state is displayed in the Status column when locating the disk pool. The classic NetBackup Administration Console procedure states that to change disk pool state, the administrator selects Media and Device Management > Device Monitor, opens the Disk Pools tab, selects the disk pool, and then chooses Actions > Up or Actions > Down. Cohesity’s disk-pool state guidance also notes that changing a disk pool to DOWN requires the disk pool not to be busy; assigned backup jobs must complete or be canceled before the state change succeeds. Therefore, the correct console path is option B.