|  | 
| I/O |  
| Option # | Manufacturing Part #
 | Description | Previous Part #
 |  
| n/a | 370-3521
 [F] | Differential Ultra/Wide SCSI Controller | n/a |  
| n/a | 370-3525
 [F] | Robotics Controller Board | n/a |  
| n/a | 370-3526
 [F] | Actuator Driver Board | n/a |  
| n/a | 370-3532
 [F] | 5-Slot Backplane | n/a |  
| Table Legend |  
| [F] = Field Replaceable Unit (FRU) [C] = Customer Replaceable Unit (CRU)
 [S] = Supported, but can no longer be ordered with this system
 [N] = No longer supported for this system
 Price = Price this Part
 |  |