HP Compatible 652564-B21 300GB 10K SAS 2.5" OEM Hard Drive in HP G8 Hot Swap Tray 100% HP Compatible  New Enterprise Grade 24/7 Cycle Duty drives selected to HP Specifications. Money Back Guarantee! Proven Sales Record of 10,000+ Units Sold! WD, Seagate, HGST Branded HDD installed in Genuine G8 HP Trays 2 Year Replacement Warranty  Serverpartdeals  RMA rate less than .5%.