Dell 529FG 4TB 7.2K RPM SAS 6Gb/s 3.5" Nearline Enterprise HDD w/ F238F Tray Offers 4TB Capacity to Store Large Amount of Enterprise Data Choose 6Gb/s SAS for data integrity, scalability and fast data access, or SATA 6Gb/s for fast, economical Tier 2/nearline performance. 7.2K RPM Spindle Speed ensures Excellent Performance 3.5" LFF FORM FACTOR