HP DX115 Removable HDD Frame/Carrier (FZ576AA)-- A receiving frame and carrier for a SAS or SATA 3 Gb/s disk. The receiving frame installs in one of the 5.25" optical bays in the workstation. The carrier holds the HDD and has a quick release handle for insertion/removal. You can install any HP supported 3.5" disk in the carrier. SATA disks are only supported when connected to the workstation's onboard SATA controller.