HP 6 bay Large Form Factor backplane kit that includes the cables for the Gen6 HP ProLiant ML370 server. The HP 507810-B21 includes the mini-SAS cable assembly that connects between the hard drive backplane board and the SAS controller board and also includes the 6-Bay SAS/SATA Large Form Factor (LFF) hard drive backplane board that mounts on the rear of the standard or optional 6-Bay LFF hard drive cage.