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Replacing an IOM

I/O modules (IOMs) provide the intelligence for drive shelf I/O operations. The DE120S, DE240S and DE600s drive shelves have two. If an IOM fails, you must replace it as soon as possible.

  • You have a replacement IOM that is supported for your drive shelf model.

  • You have an ESD wristband, or you have taken other antistatic precautions.

  • You have labels to identify each cable that is connected to the IOM.

Use this procedure to replace an IOM in the following shelves:

  • DE120S drive shelf, which contains 12 drives

  • DE240S drive shelf, which contains 24 drives

  • DE600S drive shelf, which contains 60 drives

The following figure shows the back of a DE120S or DE240S drive shelf with two IOMs:


ItemDescription
Drive shelf with two IOMs above the power-fan canisters
The following figure shows the back of a DE600S drive shelf with two IOMs:


ItemDescription
Drive shelf with two IOMs between the two power canisters
You can replace an IOM while your storage array is powered on and performing host I/O operations, as long as the following conditions are true:

  • The second IOM in the drive shelf has an Optimal status.

  • The OK to remove field in the Details area of the Recovery Guru in ThinkSystem System Manager displays Yes, indicating that it is safe to remove this component.

    Attention
    If the second IOM in the drive shelf does not have Optimal status or if the Recovery Guru indicates that it is not OK to remove the IOM, contact technical support.
  • Preparing to remove an IOM
    Before removing a I/O module (IOM), collect support data about your storage system and locate the failed component.
  • Removing an IOM
    When you remove an I/O module (IOM), you disconnect the SAS cables, and slide the IOM out of the drive shelf.
  • Installing an IOM
    When you install an IOM, you slide the IOM into the shelf, close the cam handle to secure the IOM in place, and reconnect the SAS cables.
  • After replacing an IOM
    After installing a new IOM and reconnecting the SAS cables, you must confirm that the new IOM is working correctly. Then, you can gather support data and resume operations.