DS8000 Service Documentation Version 7.5

Positioning the expansion rack

Before you begin

If you have questions about floor loading and service clearances of the racks, review the installation site requirements in the IBM® DS8870 Introduction and Planning Guide which is available on the IBM DS8000® series Service Documents CDROM.

Procedure

  1. View the rack number label Callout label 2 to determine the rack location. The rack number is located to the left of the UEPO red switch behind the Rack-1 front cover. See Figure 1.
    Figure 1. Rack serial number and rack number labels (Models 951, 95E)
    Rack serial number and rack number labels (Models 951, 95E)
  2. Facing the front of Rack-1, all additional expansion racks will be installed to the right. Move the expansion rack into position approximately 3" (75mm) from the existing rack.
  3. Locate 4 x spacer studs P/N 22R5046, 7 x spacer mounting bolts P/N 1621545, and 7 x M8 washers P/N 84X5850 in the ship group.
  4. Install the bottom spacer stud at the rear of the existing rack (Rack 1 or the expansion rack that is already installed).
    1. Refer to Figure 2. Install a spacer stud  3  in the lower rear left corner of the rack using a mounting bolt  1  and a washer  2 . Leave the bolt loose so that it will be easier to align the spacer stud with the bolt from the new frame.
      Figure 2. Interrack spacer studs
      Installing the spacer studs
  5. Determine the part number (P/N) of the interrack decorative side covers in your ship group. The P/N is printed near the middle of each side cover. There are two side covers and one top cover in the long narrow shipping box.
    • P/N 22R0786 (original version has one piece side cover) go to step 7.
    • P/N 22R4964 (new version has a hinged two piece side cover) go to step 7.
  6. In the upper rear left corner of the existing rack, next to the hinge are two holes, one above the other. Use the upper hole and install a spacer stud  3  using a mounting bolt  1  and a washer  2 , see Figure 2. Do not tighten the bolt fully as some alignment will be needed. You can hold the side cover next to the spacer studs to ensure the spring clips align properly before going to step 8.
    Note: On early frames, it may be necessary to remove the rear left top hinge and spacer plate to allow the mounting bolt to be inserted. Reinstall the hinge and plate when the bolt has been tightened.
  7. In the upper rear left corner of the existing rack, next to the hinge, there are two holes; one above the other. Use the lower hole and install a spacer stud  3  using a mounting bolt  1  and a washer  2 , see Figure 2. Do not tighten the bolt fully as some alignment will be needed. You can hold the side cover next to the spacer studs to ensure the spring clips align properly before going to step 8.
  8. On the rear of the expansion rack being installed, perform the following steps to remove the right cover.
    1. Open the rear left machine cover.
      Note: On some models, the rack machine type, model, serial (MTMS) label is located on the left rear cover, just above the door latch. If the left rear cover is removed from the rack, ensure it is reinstalled on the correct rack. If this is not done, the incorrect MTMS will be displayed on the exterior of the rack, which could result in maintenance errors or other issues. If a reference is needed, the correct rack MTMS is also shown on the "1S" label, affixed to the upper left inside wall of both the front and rear of the rack.
    2. Remove and retain the two screws  1  and open the rear right machine cover. Refer to Figure 3.
      Note: The screws must be reinstalled later to prevent non-service personnel from accessing a hazardous section of the machine.
      Figure 3. Removing retaining screws on right rear machine cover
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    3. On the upper and lower door hinges, loosen the screw  1  and move the retention plate  2  that prevents the hinge pin  3  from being removed. Refer to Figure 4.
    4. Remove the hinge pins, remove the rear cover and place it in a safe location.
    Figure 4. Removing rear right cover
    Removing the rear right cover
  9. Return to the front of the racks. Do not remove any front covers. Install 2 spacer studs on the front left of the storage expansion being installed.
    1. Install a spacer stud in the lower front left corner of the rack using a mounting bolt and a washer. Do not tighten the bolt fully as some alignment will be needed.
    2. Install a spacer stud in the upper front left corner of the rack using a mounting bolt and a washer. If there are two frame holes near the hinge, use the same hole (upper or lower) as you did at the rear of the rack. Do not tighten the bolt fully as some alignment will be needed.
  10. Move the expansion rack being installed into its final position.
  11. At the rear, secure the expansion rack being installed to the existing rack using one bolt and washer in the upper position only. The bolt is screwed into the spacer stud previously installed. Do not tighten the bolt fully.
    Note: It is not possible to install the bolt at the bottom of the rack because the 208VDC bus bars block access.
  12. At the front, insert two bolts and washers from the left rack and screw into the spacer studs previously installed in the right rack. When the alignment is correct, tighten all the bolts that have been installed.
  13. Install the wheel chocks  1  (located in the ship group) on all four casters. If caster locks are available, engage the caster locks on all casters. Refer to Figure 5.
    Figure 5. Wheel (wedge) chocks
    Wedge chocks
  14. If you are installing Rack-2, does it have an upper "funnel" bracket  2  inside at the rear top left of the rack? See Figure 6.
    • Yes, go to the next step.
    • No, go to step 18.
    Figure 6. Removing top tailgate cover plate
    Removing top tailgate cover plate
  15. Looking down at the top left rear of the rack, inspect the top tailgate cover plate screw  3 . See Figure 6.
    • If the screw is installed from the top (only screw head is visible), go to the next step.
    • If the screw is installed from inside the rack, (only threaded end is visible) to go step 17.
  16. The screw is installed from the top of the rack. Install the screw from inside the rack and then install the top tailgate.
    1. Remove and discard the nut  1  securing the upper "funnel" bracket  2  of the host cable channel. See Figure 6.
    2. Remove the long screw  3  from the top of the rack.
    3. Install the long screw  3  from inside the rack. The threaded end of the screw will extend out the top of the rack.
    4. At the top of the rack, remove the three screws that secure the cover plate to the top of the rack. Remove the cover plate.
    5. Store the cover plate in the document enclosure at the front top left of the rack.
    6. Position the tailgate assembly over the opening at the top of the rack. See Figure 7. Secure the assembly with the three screws that were removed in step d.
    7. Go to step 18.
      Figure 7. Top tailgate
      Top tailgate
  17. The screw is installed from inside the rack. Install the top tailgate.
    1. Looking down at the top of the rack, remove the three screws around the opening for the funnel bracket. See Figure 6. The cover plate already removed and stored in the document enclosure at the front top left of the rack.
    2. Position the tailgate assembly over the opening at the top of the rack. See Figure 7. Secure with the three screws that were just removed in substep a.
    3. Go to the next step.
  18. Go to the next section.