Each drive in Radial conncetion of cable B and the last end of the drives in Daisy Chain connection of cable B should be terminated.
Since a terminator module (TM312 or TM309) and Jumper Sockets on JP230 are provided to all drives as shipped, remove both of them except the last drive's ones in case of Daisy Chain connection.

Application : PCB Rev. 1,2 Jumper Location

Drive(s) on Cable B	Terminator (TM312)	JP230 (pin1-6)
Single drive on cable B
All drives in Radial connection
The last drive in Daisy Chain
All drives except the last one in Daisy Chain

Application : PCB Rev. 3 or more Jumper Location

Drive(s) on Cable B	Terminator (TM309)	JP230 (pin1-6)
Single drive on cable B
All drives in Radial connection
The last drive in Daisy Chain
All drives except the last one in Daisy Chain

Note: A drive as shipped is mounted with Terminator Module and Jumper Sockets (three) on JP230.