Removing and replacing the failed DIMM

After you diagnose the dual inline memory module (DIMM) failure, you are ready to physically remove the failed DIMM from the chassis.

Before you begin

About this task

The steps apply to H410C, H610C, and H615C nodes. An H410C node is inserted into a 2U NetApp HCI chassis. The H610C node and H615C node are built into the chassis.
Note: The terms "chassis" and "node" are used interchangeably in the case of H610C and H615C, because the node and chassis are not separate components.
Attention: H410C and H615C include DIMMs from different vendors. Ensure that you do not mix DIMMs from different vendors in one chassis.

Steps

  1. Power down the chassis or node.
    Attention: If you have a H610C or H615C chassis, power down the chassis. For H410C nodes in a 2U, four-node chassis, power down only the node with the failed DIMM.
  2. Remove the power cables and network cables, carefully slide the node or chassis out of the rack, and place it on a flat, antistatic surface.
    Tip: Consider using twist ties for cables.
  3. Put on antistatic protection before you open the chassis cover to replace the DIMM.
  4. For an H615C node, perform the following steps after you take it out of the rack:
    1. Lift the cover as shown in the following image:
      This image shows the H615C node pulled out of the rack and with the lid open in preparation for DIMM replacement.
    2. Remove the GPU (if your H615C node has GPU installed) and the airflow cover.
      This image shows the airflow covers inside the H615C chassis.
    3. Find the failed DIMM by matching the slot number/ID you noted earlier with the numbering on the motherboard. The following sample image shows you the location on the motherboard where you can find the DIMM slot numbers:
      This image shows you where to look to see the DIMM number/ID to identify the failed DIMM.
    4. Press the two retaining clips outward, and carefully pull the DIMM up.
    5. Install the replacement DIMM correctly.
      Attention: Ensure that you touch only the rear ends of the DIMM. If you press on other parts of the DIMM, it might result in damage to the hardware.

      When you insert the DIMM into the slot correctly, the two clips lock in place.

    6. Replace the airflow cover.
    7. Put the cover back on the node.
    8. Install the H615C chassis in the rack.
      Ensure that the chassis clicks when you slide it into place.
  5. For an H610C node, perform the following steps after you take it out of the rack:
    1. Lift the cover as shown in the following image:
      This image shows the H610C node pulled out of the rack and with the lid open in preparation for DIMM replacement.
    2. Loosen the four blue lock screws at the back of the node. The following image shows the location of two lock screws; you will find the other two on the other side of the node:
      This image shows the two cork screws at the back of thew H610C node, which you need to loosen in preparation for DIMM replacement.
    3. Remove both PCI card blanks.
    4. Remove the GPU and the airflow cover.
    5. Find the failed DIMM by matching the slot number/ID you noted earlier with the numbering on the motherboard. The following sample image shows you the location on the motherboard where you can find the DIMM slot numbers:
      This image shows you where to look to see the DIMM number/ID to identify the failed DIMM.
    6. Press the two retaining clips outward, and carefully pull the DIMM up.
    7. Install the replacement DIMM correctly.
      Attention: Ensure that you touch only the rear ends of the DIMM. If you press on other parts of the DIMM, it might result in damage to the hardware.

      When you insert the DIMM into the slot correctly, the two clips lock in place.

    8. Replace all the components that you removed: GPU, airflow cover, and PCI blanks.
    9. Tighten the lock screws.
    10. Put the cover back on the node.
    11. Install the H610C chassis in the rack.
      Ensure that the chassis clicks when you slide it into place.
  6. For an H410C node, perform the following steps after you unplug the cables and remove the node from the chassis:
    1. Place the node on a flat surface.
      Shows the H410C node.
    2. Find the failed DIMM by matching the slot number/ID you noted earlier with the numbering on the motherboard. The following sample images show you the location on the motherboard where you can find the DIMM slot numbers:
      This image shows the location of the DIMM slots on the H410C chassis motherboard.

      Shows the place on the H410C motherboard where the DIMMs are labeled.
    3. Press the two retaining clips outward, and carefully pull the DIMM up. The following image shows the retaining clips:
      This image shows the retaining clips on the DIMMs.
    4. Install the replacement DIMM correctly.
      Attention: Ensure that you touch only the rear ends of the DIMM. If you press on other parts of the DIMM, it might result in damage to the hardware.

      When you insert the DIMM into the slot correctly, the two clips lock in place.

    5. Install the node in the NetApp HCI chassis.
      Ensure that the node clicks when you slide it into place.
  7. Insert the power cables and network cables.
    Ensure that all the port lights turn on.
  8. Press the power button at the front of the node if it does not power on automatically when you install it.
  9. After the node is displayed in vSphere, right-click the name and take the node out of maintenance mode.
  10. Verify the hardware information as follows:
    1. Log in to the baseboard management controller (BMC) UI.
    2. Select System > Hardware Information, and check the DIMMs listed.

After you finish

After the node returns to normal operation, in vCenter, check the Summary tab to ensure that the memory capacity is as expected.
Note: If the DIMM is not installed correctly, the node will operate normally but with lower than expected memory capacity.
Tip: After the DIMM replacement procedure, you can clear the warnings and errors on the Hardware Status tab in vCenter. You can do this if you want to erase the history of errors related to the hardware that you replaced.

VMware KB article