Connect and hot swap four 35in sata iii or sas ii hard drives to your computer system in three 525 bays with support for transfer speeds up to 6 gbps the hsb4satsasba removable 4 drive backplane makes inserting and removing drives fast and easy by turning three 525 bays into a hot swappable interface for up to four 35 sata or sas hard drives hdd for added versatility the hot swap bay can interface with sata iiiiii and sas iii hard drives an ideal solution for enterprise sys