HP 581284-B21 450GB 6G 10K SFF G7 Enterprise Hard DriveHP 450GB 6G SAS 10K SFF (2. 5 inch) SC Enterprise Hard Drive Model Number EG0450FCSPK, EG0450FBDSQ, EG0450FBLSF, EG0450FBDBT, EG0450FBVFM, EG0450FCHHT, EG0450FCVBH Spare 581310 001 Option PN 581284 B21, 581284 S21 GPN 507129 012, 507129 011 ASSY PN : 597609 002, 599476 002, 619286 002, 641552 002, 666355 002, 689287 002, 693569 002, 693569 006 HP MODEL : 653956 001 Drive Model ST9450405SS AL13SEB450 RPM : 10K For Servers G1 to G7 HP Certified Disks