Replacing the control enclosure support rails

You can replace faulty support rails with new rails that are received from stock.

About this task

As part of this procedure, the control enclosure must be removed from the rack. If all of the components are installed in the enclosure, three persons are required to remove the enclosure at step 7. Follow all safety precautions when you complete this procedure.

CAUTION:
Two graphics show 3 persons carrying a heavy box; one graphic shows an icon with text warning that weight i s more than 32 kg (70.5 lb)
The weight of this part or unit is between 32 and 55 kg (70.5 and 121.2 lb). It takes three persons to safely lift this part or unit. (C010)

However, it is possible to enable one person to complete this task. To do so, you can remove the components from the control enclosure before you remove it from the rack. Record the serial number of the component in each location so that the components can be returned to the same location at the end of the procedure. Then, remove the components and place them in a safe location:

Procedure

  1. Identify the enclosure that is mounted on the rails that are being replaced.
    Follow the steps in Procedure: Identifying which enclosure or canister to service to ensure that you identify the correct enclosure.
  2. Shut down the control enclosure by following the steps in Procedure: Powering off a Storwize V7000 Gen2 control enclosure.
  3. Remove power from the enclosure by unplugging both power cables from the electrical outlets.
  4. Remove all cables from the back of the enclosure that has faulty support rails; ensure that you identify the port to which each cable connects.
  5. Remove the end caps from the front flanges of the enclosure, as described in topic Removing and replacing the enclosure end caps.
  6. Unscrew the four M5 screws that secure the left and right end caps of the control enclosure to the rack, as shown in Figure 1.
    Figure 1. Four screws at the front of the enclosure
    Image of the M5 screws and silver screws
    Some installations might have two black, removable M5 screws and two silver screws that remain attached to the control enclosure after they are loosened. Figure 2 shows an example of an silver alternative rail pin for square holes and an M5 screw.
    Figure 2. Example of a silver screw and M5 screw
    Image of the M5 screw and silver screw
  7. Slide the enclosure from the rack.
    • If components were not removed from the control enclosure, ensure that three persons are available to support the weight of the enclosure when it is removed from the rack.
    • If only one person is available, you can remove several internal components to decrease the weight of the control enclosure. Be sure to note the serial numbers and slots (for drives) for each component and follow the procedures that are listed in Table 1.
      Table 1. Summary of internal components that can be removed and replaced
      Component Serial number / slot number Procedure
      Node canister 1   Reseating a node canister in the control enclosure
      Node canister 2  
      Power supply unit 1   Removing and replacing a power supply unit
      Power supply unit 2  
      Power interposer 1   Removing and replacing a power interposer
      Power interposer 2  
      Drives (1 - 24 drives). Record the slot from which each drive was removed.   Removing and replacing a drive
  8. Locate the left support rail.
    Record the shelf number of the support rail so that the replacement rails can be installed into the same position.
  9. At the rear of the rack, remove the black M5 screws from the rear bracket of the rail. Two screws are attached to each bracket. Then, open the rear hinge bracket, as show in Figure 3.
    Figure 3. Opening the rear hinge bracket of the mounting rail
    Opening rear hinge bracket of mounting rail
  10. At the front of the rack, hold on to the rail and open the front hinge bracket.
  11. Compress the rail to shorten it, then, remove it from inside the rack, as Figure 4 shows.
    Figure 4. Compressing the rail for removal from rack
    Compressing the rail for removal from rack
  12. Repeat steps 9 to 11 on the right support rail.
  13. Install the new support rails at the rack position that is recorded at step 8. Follow the procedure, as described in Installing support rails for the control enclosure.
  14. Return the control enclosure that was removed at step 7 to the rack.
    • If no components were removed from the control enclosure, ensure that three persons are available to support the weight.
    • If components were removed, return the control enclosure to the rack position from which it was removed. Then, follow the procedures that are listed in Table 1 to reinstall each component into the control enclosure.
  15. Secure the control enclosure to the rail with the four black M5 screws that were removed at step 6.
    Note: Some installations might have two black, removable M5 screws and two silver screws that are built into the control enclosure. In this case, first secure the silver screws and then secure the M5 screws.
  16. Reinstall the end caps (removed at step 5) by following the instructions in Removing and replacing the enclosure end caps.
  17. Reconnect the cables, ensuring that they are connected to their original ports.
  18. Reconnect the power supply cables to their original power supply and electrical outlet.
    The system starts.
  19. After the system is online, use the management GUI to verify that the system is functioning correctly.