|  | 
      
      
        
          | Option # | Top Level Part #
 | Manufacturing Part #
 | Description | Substitute Part #
 |  
          | X1032A | 595-4258 | 501-5656
              [F] | Single-Ended Ultra/Wide SCSI (SunSwift PCI) | 501-2741
              [F] |  
          | X6541A | 595-4414 | 375-0006
              [F] | Dual Differential Ultra/Wide SCSI (PCI) | n/a |  
      
        | Table Legend |  
        | [F] = Field Replaceable Unit (FRU) [S] = Supported, but can no longer be ordered 
                                     with this system
 [N] = No longer supported for this system
 |  |