DS8000 Service Documentation Version 7.5

PCIe and SPCN cable bundle is preinstalled in Rack-1

Procedure

  1. This step shows an overview of the Rack-1 to Rack-2 routing of the PCIe  1  and SPCN  2  cables in Rack-1 (Figure 1) and Rack-2 (Figure 2). Do not route or connect the cables until directed in later steps.
    Figure 1. Rack-1 Mechanical routing of the PCIe and SPCN cables (rack-to-rack)
    Rack-1 Mechanical routing of the PCIe and SPCN cables
    Figure 2. Rack-2 Mechanical routing of the PCIe and SPCN cables (rack-to-rack)
    Rack-2 Mechanical routing of the PCIe and SPCN cables (rack-to-rack)
  2. At the rear of Rack-1, uncoil the thick PCIe cables and the thin SPCN cables that are coiled behind the I/O enclosures.
  3. At the rear of Rack-1, route the PCIe Callout label 1 and SPCN Callout label 2 cables down and out the tailgate. See Figure 3.
    1. Route the PCIe cables into a central bundle Callout label 1 that exits the left side of the tailgate as shown.
    2. Pull the cable bundle up into Rack-1 to allow an "S" curve Callout label 1. The curve allows the bundle to be moved left or right for better access when replacing FRUs.
    3. Use cable ties to tie the cable bundles to the tie points Callout label 1 (Figure 4) on the left side of the tailgate.
    Figure 3. Rack-1 Mechanical routing of the PCIe and SPCN cables (rack-to-rack)
    Rack-1 Mechanical routing of the PCIe and SPCN cables
    Figure 4. Tailgate cable bundle tie points
    Tailgate cable bundle tie points
  4. Route the Rack-1 PCIe and SPCN cables to Rack-2.
    • On a raised floor, the cables are routed down through the tile cutouts and underneath the floor.
    • On a non-raised floor, the cables are routed beneath the racks.
  5. Route the PCIe and SPCN cables up through the Rack-2 tailgate. Leave them laying loose.
  6. At the rear of Rack-1, observe the T4 connectors on the bottom two I/O enclosures. See Figure 5 and Figure 6.
    • R1-XI3-P1-C7-T4
    • R1-XI4-P1-C7-T4
    Find the condition that applies:
    • SPCN cables are connected to both T4 connectors and the cables go to the tailgate.
      In addition to the location code label, most of these SPCN cables are labeled "FROM RACK 2."
      Go to step 7.
    • SPCN cables are connected to both T4 connectors and go to the Rack-1 CEC enclosure cable management arms.
      In addition to the location code label, most of these SPCN cables are labeled "FROM RACK 1."
      1. Disconnect the two cables from the I/O enclosure T4 connectors and use cable ties to fasten them out of the way.
      2. Find the two SPCN cable ends Callout label 1 in the cable bundle that exits the tailgate. See Figure 5. In addition to the location code label, most of these SPCN cables are labeled "FROM RACK 2."
      3. Remove the cable connector protector covers and install them on the two cables you just disconnected.
      4. Remove cable ties from the cable bundle down to the tailgate.
      5. Use the cable location labels to route the two SPCN cables to the correct I/O enclosure T4 connector. See Figure 6.
      6. Connect the two SPCN cables.
      7. Reinstall the cable ties on the cable bundle.
      8. Go to step 7.
    • SPCN cables are not connected to both T4 connectors. The cables Callout label 1 are tied into the cable bundle. See Figure 5.
      1. Remove cable ties from the cable bundle down to the tailgate.
      2. Use the cable location labels to route the two SPCN cables to the correct I/O enclosure T4 connector. See Figure 6.
        In addition to the location code label, most of these SPCN cables are labeled "FROM RACK 2."
      3. Connect the two SPCN cables.
      4. Reinstall the cable ties on the cable bundle.
      5. Go to step 7.
    Figure 5. Rack-2 SPCN cables in Rack-1
    Rack-2 SPCN cables in Rack-1
    Figure 6. I/O enclosure locations on cable labels
    Model 951, I/O enclosure locations on cable labels
    Figure 7. CEC enclosure locations on cable labels (rear view)
    Rear view of CEC enclosure locations on cable labels
  7. At the rear of Rack-1, connect the Rack-2 SPCN cable to the upper CEC enclosure (XC1).
    1. Locate the SPCN cable in the upper CEC cable management arm that has a location label with XC1-P1-T4.
      The SPCN cable should also be labeled "FROM RACK 2."
    2. Disconnect the existing SPCN cable from upper CEC XC1-P1-T4.
      The SPCN cable should also be labeled "FROM RACK 1." See Figure 7.
    3. Move the connector cover from the Rack-2 SPCN cable to the Rack-1 SPCN cable you just disconnected.
    4. Connect the Rack-2 SPCN cable to upper CEC XC1-P1-T4. See Figure 7 and Figure 8.
  8. At the rear of Rack-1, connect the Rack-2 PCIe cables to the upper CEC enclosure (XC1).
    1. Locate the PCIe cables in the upper CEC cable management arm with the following location labels:
      • XC1-P1-C1-T3
      • XC1-P1-C8-T3
      • XC1-P1-C8-T2
      • XC1-P1-C8-T1
    2. Remove the protective cover from each PCIe cable connector and card connector. Then, connect each cable to the PCIe location shown on the label. See Figure 7 and Figure 9. Store the protective covers in the document enclosure for later use.
  9. At the rear of Rack-1, connect the Rack-2 SPCN cable to the lower CEC enclosure (XC2).
    1. Locate the SPCN cable in the lower CEC cable management arm that has a location label with XC2-P1-T4. The SPCN cable should also be labeled "FROM RACK 2".
    2. Disconnect the existing SPCN cable from lower CEC XC2-P1-T4.
      The SPCN cable should also be labeled "FROM RACK 1." See Figure 7.
    3. Move the connector cover from the Rack-2 SPCN cable to the Rack-1 SPCN cable you just disconnected.
    4. Connect the Rack-2 SPCN cable to lower CEC XC2-P1-T4. See Figure 7 and Figure 8.
  10. At the rear of Rack-1, connect the Rack-2 PCIe cables to the lower CEC enclosure (XC2).
    1. Locate the PCIe cables in the lower CEC cable management arm with the following location labels:
      • XC2-P1-C1-T3
      • XC2-P1-C8-T3
      • XC2-P1-C8-T2
      • XC2-P1-C8-T1
    2. Remove the protective cover from each PCIe cable connector and card connector. Then, connect each cable to the PCIe location shown on the label. See Figure 7 and Figure 9. Store the protective covers in the document enclosure for later use.
  11. At the rear of Rack-2, route and connect the SPCN cables coming up through the tailgate to the proper I/O enclosure connectors. See Figure 2.
    1. See Figure 6 and Figure 8. Locate the four SPCN cables in the PCIe and SPCN cable bundle that have the following location code labels:
      • R2-XI1-P1-C7-T3
      • R2-XI2-P1-C7-T3
      • R2-XI3-P1-C7-T4
      • R2-XI4-P1-C7-T4
    2. Connect the cables.
    Figure 8. Rack-2 to Rack-1 SPCN cables
    Rack-2 to Rack-1 SPCN cables
  12. At the rear of Rack-2, route and connect the PCIe cables coming up through the tailgate to the proper I/O enclosure connectors. See Figure 2.
    1. See Figure 6 and Figure 9. Locate the eight PCIe cables in the PCIe and SPCN cable bundle that have the following location code labels:
      • R2-XI1-P1-C7-T1 and R2-XI1-P1-C7-T2
      • R2-XI2-P1-C7-T1 and R2-XI2-P1-C7-T2
      • R2-XI3-P1-C7-T1 and R2-XI3-P1-C7-T2
      • R2-XI4-P1-C7-T1 and R2-XI4-P1-C7-T2
    2. Connect the cables.
    3. Pull the cable bundle up into the rack to allow an "S" curve in the PCIe and SPCN cables. The curve allows the cables to be moved left or right for better access when replacing FRUs.
    4. Use cable ties to tie the cable bundles to the tie points Callout label 1 (Figure 4) on the left side of the tailgate.
      Figure 9. Rack-2 to Rack-1 PCIe cables
      Rack-2 to Rack-1 PCIe cables
  13. Reinstall the tailgate frame brackets in Rack-1 and Rack-2.
  14. Go to Completing the logical installation of the I/O enclosures.