Dell GWD7D 1TB 7.2k rpm SAS 12G 3.5" Hard Drive offers 1TB Capacity with Enterprise level SAS (Serial Attached SCSI) 3.5 inch Interface for fast and reliable 24/7 access to your server and storage RAID units in your IT infrastructure or Data Center. Dell Branded disk drives are loaded with Dell firmware to ensure reliable data communication between your enterprise components.