The IBM 300 GB 6 Gbps SAS 3.5-inch HS HDDs provide 3.5-inch form factor that can be used in hot-swap systemsThey are supported for internal HDD attachment in hot-swap SAS models of selected IBM System x systems. With rigorous testing by IBM through the ServerProven program, you can maintain a high degree of confidence that your IBM storage subsystem is compatible and will function reliably.