This product is either discontinued or we cannot get that from suppliers.
Dell 400-ATKB, Capacity 2TB 3.5" 7200RPM 6Gb/s, Hot Plug Hard Drive for R440/R540, Hot plug server drive, 6Gbps, Compatible with Dell servers.
Dell 2TB 7.2K RPM SATA 6GBPS 512n 2.5" Hot Plug Hard Drive 3.5" (400-ATKB) Increase the storage capacity of your Dell™ System with 2 TB Hard Drive from Dell.