Dell 8Y2C8 PowerEdge R640 10x 2.5? BP to Mini Mono RAID Cable The Dell part number 8Y2C8 refers to a SAS (Serial Attached SCSI) cable specifically designed for connecting the backplane of a Dell PowerEdge R640 server with a 10x 2.5" drive configuration to a Mini Mono RAID controller. Here's a breakdown of what this cable does and its key features: Purpose: It serves as the data pathway between the 2.5" drives in the front backplane of the R640 and the internal Mini Mono RAID controller. This allows the RAID controller to manage and configure the physical drives into logical RAID arrays. Compatibility: This cable is specifically for the Dell PowerEdge R640 server with a 10x 2.5" Small Form Factor (SFF) drive configuration. Connectors: It typically features a connector that plugs into the Mini Mono RAID controller on the system board and two Mini-SAS HD (SFF-8643) connectors that connect to the backplane. These SFF-8643 connectors are high-density and designed for high-speed data transfer. Length: The length of the cable is approximately 18.5 inches (47 cm). Part Numbers: This cable might also be listed under the Dell part number 08Y2C8. In summary, the Dell 8Y2C8 cable is a crucial component for enabling RAID functionality on an R640 server with a 10x 2.5" drive configuration by connecting the drives to the Mini Mono RAID controller. Warranty: 60day