Exchange the storage enclosure midplane

Before you begin

Icon for electrostatic discharge wrist strapUse approved ESD procedures to prevent damage.

Attention:
  • This procedure is not a stand-alone procedure. Customer disruption and damage to the hardware might occur when microcode and power boundaries are not in the proper conditions for this service action.
  • If a serviceable event FRU repair directed you to this procedure, the microcode and power boundaries are already set.
  • If a serviceable event FRU repair did not direct you to this procedure, see MAP1230 Replace a FRU without using a serviceable event.
Notes:
  • All the cables and FRUs to be removed must be uniquely identified so they can be reinstalled correctly.
  • If an installed earthquake resistance kit prevents you from accessing this FRU, refer to MAP1600.

Remove the storage enclosure midplane

Before you begin

Notes:
  • Ensure that you have been directed here by a management console guided FRU replacement procedure. The storage enclosure communications must be in the proper state to protect the customer from data loss.
  • This procedure requires an 8 mm socket wrench.

Procedure

  1. To locate this FRU, take one of the following actions and then return here and continue to replace the FRU:
    • If this FRU has a FRU identify indicator, use the FRU identify indicator, which is listed in MAP1240 Locating FRUs by using identify indicators. If not, use the location code.
      Note: There might be cases where the FRU failure or fencing conditions prevent the FRU LED indicator from being lit even if the FRU has power.
    • Use the location code, which is listed in MAP1245 Finding FRUs by using location codes.
    • If there is no FRU identify indicator or location code, you were sent here by an isolation MAP or symbolic FRU procedure. Use the information in that procedure and the figures in this procedure to locate the proper part to exchange.
  2. Most, but not all, FRUs have identify indicators. Use the flashing amber or solid blue FRU identify indicators to ensure that you are working on the correct enclosure or FRU.
  3. At the rear of the rack, if microbays are located behind the affected storage enclosure, move one or both microbays to the service position as needed to allow access to the storage enclosure.
    Note: Do not disconnect any microbay cables.
    1. Press the release tabs Callout label 1 toward the center of the microbay. See Figure 1.
    2. Slide the microbay back to the service position. See Figure 1.
    Figure 1. Microbays C1 (left, in operating position) and C2 (right, in service position)
    Microbays C1 (left, in operating position) and C2 (right, in service position)
  4. At the rear of the storage enclosure, release both power input cables from the retention brackets and disconnect them. See Figure 2.
    Figure 2. Rear view of the power supply
    Rear view of the power supply
    Important: Each drive module and enclosure services manager (ESM) MUST BE INSTALLED IN THE SAME POSITION in the storage enclosure after the midplane is replaced.
    Warning: If the drives are swapped between slots, customer data is not accessible and might be lost.
  5. At the front of the rack, remove each drive from the storage enclosure and set in a safe place. Ensure that each drive is reinstalled in the same position in the storage enclosure after the midplane is replaced. Write down the serial number and position of each part before removing them. See Figure 3 and Figure 4.
    Figure 3. Storage enclosure locations (front view) (SAS flash enclosure, 24 drive slots)
    Storage enclosure locations (front view) (SAS flash enclosure, 24 drive slots)
    Figure 4. Removing a drive from a storage enclosure
    Removing a drive from a storage enclosure
  6. At the rear of the rack, ensure that the SAS cables that are connected to the enclosure services managers (ESMs) are labeled correctly. See Figure 5. Disconnect the SAS cables from both ESMs.
  7. At the rear of the rack, remove each ESM (P1-C1 and P1-C2). See Figure 5. Ensure that each ESM is reinstalled in the same position in the storage enclosure after the midplane is replaced. Write down the serial number and position of each part before removing them.
    Note: For help removing the ESM FRUs, refer to Exchange the Enclosure Services Manager (ESM).
    Figure 5. Storage enclosure locations (rear view) (SAS flash enclosure, 24 drive slots)
    Storage enclosure locations (rear view) (SAS flash enclosure, 24 drive slots)
  8. At the rear of the rack, remove each power supply (P1-E1 and P1-E2). See Figure 5.
    Note: For help removing the power supplies, refer to Exchange the storage enclosure power supply.
  9. At the front of the rack, remove the plastic decorative bezel at the left end.
  10. At the front of the rack, remove the two screws fastening the storage enclosure chassis to the rack mount rails and then remove the storage enclosure from the rack.
  11. Did the FRU kit you received contain a midplane assembly, or an entire storage enclosure (without drives, ESMs, and power supplies)?
    • The FRU kit contained a midplane assembly only. Continue with step 12.
    • The FRU kit contained an entire storage enclosure. Go to Install the storage enclosure midplane, below, to install the new enclosure.
  12. Remove the midplane assembly screws as shown in Figure 6. Label the screws with the location from which they are removed.
    Figure 6. Removing the midplane assembly screws
    Removing the midplane assembly screws
    1. Remove the enclosure from the rack, turn it upside down, and place the enclosure on a flat surface.
    2. Using a #1 Phillips screwdriver, remove the four screws Callout label A from the bottom of the enclosure.
    3. Turn the enclosure top side up and place it on a flat surface. Using a #2 Phillips screwdriver, remove the four screws Callout label B on the right and left sides of the enclosure.
    4. Remove the four screws on the mounting brackets. Screws at Callout label C require a #2 Phillips screwdriver; screws at Callout label D require a straight-slot screwdriver.
  13. Remove the midplane assembly by sliding the assembly straight out of the enclosure.

Install the storage enclosure midplane

Procedure

  1. Did the FRU kit you received contain a midplane assembly, or an entire storage enclosure (without drives, ESMs, and power supplies)?
    • The FRU kit contained a midplane assembly only. Continue with step 2.
    • The FRU kit contained an entire storage enclosure. Go to step 4 to install the new enclosure.
  2. Install the new midplane assembly.
    1. Grasp the midplane assembly Callout label A with two hands and hold it at a 20-degree angle as shown in Figure 7.
    2. Insert the three tabs Callout label B on the midplane assembly into the tab holes in the enclosure. Ensure that the tabs go over the mesh gasket material; do not allow the tabs to catch and crush the mesh.
      Figure 7. Midplane assembly installation
      Midplane assembly installation
    3. Rotate the front of the assembly down. Ensure that the midplane is fully seated into the enclosure.
  3. Install the midplane assembly screws. Refer to Figure 6.
    1. Insert four screws Callout label B on both the right and left sides of the enclosure. Insert the screws, but do not fully tighten them.
    2. Insert four screws Callout label C and Callout label D at the front of the enclosure. Insert the screws, but do not fully tighten them now.
    3. Turn the enclosure upside down and use the four screws Callout label A to secure the midplane to the bottom of the enclosure. Securely tighten these bottom screws.
    4. Turn the enclosure top side up and securely tighten the screws at Callout label B, Callout label C, and Callout label D.
    5. Install the enclosure in the rack.
  4. At the front of the rack, install the storage enclosure.
  5. Install the two screws (bottom left and bottom right) that fasten the chassis to the rack mount rails.
  6. Install the left decorative bezel.
  7. Install each drive in its original position.
    Warning: If the drives are swapped between slots, customer data is not accessible and might be lost.
  8. At the rear of the rack, install each ESM in its original position (P1-C1 and P1-C2).
    Note: Do not connect the SAS cables now. They will be connected in a later step.
  9. At the rear of the rack, install the two power supplies (P1-E1 and P1-E2).
  10. Connect the power input cables to both power supplies. Secure each cable with the retention bracket.
  11. Wait for one minute after the attention/identify LED Callout label 5 goes out on both ESMs. See Figure 8.
    Figure 8. Enclosure services manager (ESM) LEDs
    Enclosure services manager (ESM) LEDs
  12. Disconnect the power input cables from both power supplies.
    Note: The cables can remain fastened to the retention brackets.
  13. Connect the SAS cables to the ESM SAS ports. See Figure 5.
    Use the location code labels on each cable to ensure it is properly connected.
  14. Reconnect the power input cables to both power supplies.
  15. If any microbays are in the service position, return them to the operating position.
    1. Slide the microbay forward to the operating position.
    2. Ensure the release tabs latch into the microbay tray. See Figure 1.
  16. Exit this service information center parts exchange procedure and return to the procedure that sent you here.