HGST HGST Ultrastar He8 8TB 3.5" 128MB 7200RPM SAS Ultra 512E ISE 128MB Cache 12Gb/s Internal Hard Drive - HUH728080AL5200 / 0F23268 128 MB Cache 3.5-Inch Internal Bare or OEM Drives 0F23268 Industry's leading 8TB capacity in a standard 3.5-inch form factor Industry's best Idle and Active power efficiency (Watts/TB) Reliable, field-proven, 2nd generation HelioSeal process and 7Stac design 2M hours MTBF rating & 5-year limited warranty Advanced format 4Kn and 512e models