DS8000 Service Documentation Version 7.5

CEC enclosure location codes (Model 961)

You can identify the CEC enclosure in which a field replaceable unit (FRU) is plugged by its location code. The first character of the location code is always U followed by a 4-character feature code or enclosure type, as shown in the following example:
  • U78AA.001.10ABCDE-P1-C15
In this example, the enclosure type is 78AA. The next 3 characters of the location code indicate the model of the enclosure (001 in the example). The next string of characters provides the enclosure serial number (10ABCDE in the example).
CEC enclosures for a Model 961 are normally feature code U78AA.001.
Table 1. Feature codes and related systems
Feature code (Utttt) System
U78AA.001 8205-E6C, 8205-E6D
The CEC enclosure type (feature code) label is on the front of the CEC enclosure, behind the front cover, to the right of the disk drive enclosure.
Figure 1. CEC enclosure feature code label
Image of CEC enclosure feature code label

Table 2 summarizes the CEC enclosure assembly with references to figures that display location codes.

For part numbers, see CEC enclosure part numbers, Model 961.

Table 2. Summary of CEC enclosure assembly locations
Assembly Reference
CEC enclosure front location codes Figure 2
CEC enclosure top location codes Figure 3
CEC enclosure rear location codes Figure 4
CEC enclosure memory card location codes Figure 5

CEC enclosure front overview

Figure 2. CEC enclosure location codes (front)
CEC enclosure location codes (front)
Table 3. CEC enclosure location codes (front)
Location code Part name Connector
Un-A3 CEC enclosure fan 3  
Un-A4 CEC enclosure fan 4
Un-D1 CEC enclosure control panel assembly
Un-D1-T1 Not used. USB
Un-P2 CEC enclosure disk drive backplane  
Un-P2-D1 CEC enclosure disk drive
Un-P2-D2 CEC enclosure disk drive
Un-P2-D3 CEC enclosure disk drive
Un-P2-D4 CEC enclosure disk drive
Un-P2-D5 CEC enclosure disk drive
Un-P2-D6 CEC enclosure disk drive
Un-P2-D7 CEC enclosure disk drive
Un-P2-D8 CEC enclosure disk drive

CEC enclosure top overview

Figure 3. CEC enclosure location codes (top) (Model 961)
CEC enclosure location codes (top)
Table 4. CEC enclosure location codes (top)
Location code Part name Connector
Un-A1 CEC enclosure fan 1  
Un-A2 CEC enclosure fan 2  
Un-A3 CEC enclosure fan 3  
Un-A4 CEC enclosure fan 4  
Un-P1 CEC enclosure system backplane (Includes embedded FSP Flexible Service Processor function)  
Un-P1-C1-A1 CEC enclosure PCIe expansion feature - Fan 1  
Un-P1-C1-A2 CEC enclosure PCIe expansion feature - Fan 2  
Un-P1-C9 CEC enclosure processor module 2 Voltage Regulator Module  
Un-P1-C10 CEC enclosure processor module 2  
Un-P1-C11 CEC enclosure processor module 1  
Un-P1-C12 CEC enclosure processor module 1 Voltage Regulator Module  
Un-P1-C14 Not used.  
Un-P1-C15 CEC enclosure memory card 4  
Un-P1-C15-C11 CEC enclosure memory card 4 - DIMM 1  
Un-P1-C15-C21 CEC enclosure memory card 4 - DIMM 2  
Un-P1-C15-C31 CEC enclosure memory card 4 - DIMM 3  
Un-P1-C15-C41 CEC enclosure memory card 4 - DIMM 4  
Un-P1-C15-C71 CEC enclosure memory card 4 - DIMM 5  
Un-P1-C15-C81 CEC enclosure memory card 4 - DIMM 6  
Un-P1-C15-C91 CEC enclosure memory card 4 - DIMM 7  
Un-P1-C15-C101 CEC enclosure memory card 4 - DIMM 8  
Un-P1-C16 CEC enclosure memory card 3  
Un-P1-C16-C11 CEC enclosure memory card 3 - DIMM 1  
Un-P1-C16-C21 CEC enclosure memory card 3 - DIMM 2  
Un-P1-C16-C31 CEC enclosure memory card 3 - DIMM 3  
Un-P1-C16-C41 CEC enclosure memory card 3 - DIMM 4  
Un-P1-C16-C71 CEC enclosure memory card 3 - DIMM 5  
Un-P1-C16-C81 CEC enclosure memory card 3 - DIMM 6  
Un-P1-C16-C91 CEC enclosure memory card 3 - DIMM 7  
Un-P1-C16-C101 CEC enclosure memory card 3 - DIMM 8  
Un-P1-C17 CEC enclosure memory card 2  
Un-P1-C17-C11 CEC enclosure memory card 2 - DIMM 1  
Un-P1-C17-C21 CEC enclosure memory card 2 - DIMM 2  
Un-P1-C17-C31 CEC enclosure memory card 2 - DIMM 3  
Un-P1-C17-C41 CEC enclosure memory card 2 - DIMM 4  
Un-P1-C17-C71 CEC enclosure memory card 2 - DIMM 5  
Un-P1-C17-C81 CEC enclosure memory card 2 - DIMM 6  
Un-P1-C17-C91 CEC enclosure memory card 2 - DIMM 7  
Un-P1-C17-C101 CEC enclosure memory card 2 - DIMM 8  
Un-P1-C18 CEC enclosure memory card 1  
Un-P1-C18-C11 CEC enclosure memory card 1 - DIMM 1  
Un-P1-C18-C21 CEC enclosure memory card 1 - DIMM 2  
Un-P1-C18-C31 CEC enclosure memory card 1 - DIMM 3  
Un-P1-C18-C41 CEC enclosure memory card 1 - DIMM 4  
Un-P1-C18-C71 CEC enclosure memory card 1 - DIMM 5  
Un-P1-C18-C81 CEC enclosure memory card 1 - DIMM 6  
Un-P1-C18-C91 CEC enclosure memory card 1 - DIMM 7  
Un-P1-C18-C101 CEC enclosure memory card 1 - DIMM 8  
Un-P1-C19 CEC enclosure I2C interface card  
Un-P1-C20 CEC enclosure VPD card  
Un-P1-E1 CEC enclosure Time of Day battery  
Un-P2 CEC enclosure disk drive backplane  
Um-Y1 CEC enclosure firmware  
Note 1: For CEC enclosure memory card DIMM locations, see Figure 5.

CEC enclosure rear overview

Figure 4. Location codes for the CEC enclosure (rear view) (Model 961)
Location codes for the CEC enclosure (rear view) (Models 961)
Table 5. CEC enclosure location codes (rear view)
Location code Part name Connector
Un-E1 CEC enclosure power supply 1  
Un-E1-J1   Power
Un-E2 CEC enclosure power supply 2  
Un-E2-J1   Power
Un-P1 CEC enclosure system backplane (Includes embedded FSP Flexible Service Processor function)  
Un-P1-C1 CEC enclosure PCIe three-port card  
Un-P1-C1-T1   PCIe
Un-P1-C1-T2   PCIe
Un-P1-C1-T3   PCIe
Un-P1-C1-C1 CEC enclosure I2C passive connector card  
Un-P1-C1-C1-T1   I2C (to RPC)
Un-P1-C1-C1-T2   I2C (to RPC)
Un-P1-C1-C2 Not used  
Un-P1-C1-C3 Not used  
Un-P1-C1-C4 Not used  
Un-P1-C2 CEC enclosure Ethernet four-port card  
Un-P1-C2-T1   Ethernet (LPAR)
Un-P1-C2-T2   Ethernet (LPAR)
Un-P1-C2-T3  Not used Ethernet
Un-P1-C2-T4 Not used Ethernet
Un-P1-C3 CEC enclosure PCIe single-port card  
Un-P1-C3-T1   PCIe
Un-P1-C4 CEC enclosure PCIe single-port card  
Un-P1-C4-T1   PCIe
Un-P1-C5 CEC enclosure RS-485 serial-interface card  
Un-P1-C5-T1   RS-485 serial
(to RPC)
Un-P1-C5-T2   RS-485 serial
(to RPC)
Un-P1-C6 Not used.  
Un-P1-C8 CEC enclosure PCIe three-port card  
Un-P1-C8-T1   PCIe
Un-P1-C8-T2   PCIe
Un-P1-C8-T3   PCIe
Un-P1-T1 Not used Serial
Un-P1-T2 Not used Serial
Un-P1-T3   SPCN
Un-P1-T4   SPCN
Un-P1-T5   Ethernet
(service processor)
Un-P1-T6   Ethernet
(service processor)

CEC enclosure memory card location codes

Figure 5. Memory module locations on the memory card (Un-P1-Cx) (Model 961)
Memory module locations on the memory card (Un-P1-Cx)