Command Changes44 DD400 Series Restorer User Guide• The maximum total size of all LUNs accessed by a DD400g is 4.2 TB.• After configuring a DD400g, you cannot grow a LUN or the volume accessed by the DD400g.• A DD400g writes to all LUNs that are on a disk array and that are available to the DD400g(not masked).• A Fiber Channel host bus adapter card (QLogic 2 gigabit class) in the restorer communicateswith the external disk array. See Figure 19 for a schematic of the peripheral cards in aDD400g.Command ChangesThe following disk commands are not valid for a restorer using external storage. All othercommands in the Data Domain command set are available.disk beacondisk faildisk unfaildisk show debugdisk show failure-historydisk show reliability-dataFigure 19: Peripheral card slotsRestorerfront panelBack panel