841 Supported hardware change detected.

  Explanation
A change was detected in the node or node canister hardware configuration. The
    new configuration is supported by the node software or the node canister machine code. The new
    configuration does not become active until it is activated. 
A node or
    node canister configuration is remembered only while it is active in a system. This node or node
    canister error is therefore resolved by using the management GUI.

  User response
Use the management GUI to
    run the suggested actions for the associated service error code. Use the directed maintenance to
    accept or reject the new configuration.

   The following note does not apply to IBM Spectrum Virtualize for Public Cloud or FlashSystem 900.

Important: If
    you update your system software to version 8.1.1 or later from a version earlier than 8.1.0, on
    a system where you have already installed more than 64 GB of RAM, all nodes return from the
    update with an error code of 841. Versions 8.1.0 and later allocate memory in a different way
    than previous versions, so the RAM must be "accepted" again. To resolve the error, complete the
    following steps:
     On a single node, run the svctask chnodehw command. Do not run the
      command on more than one node at a time.

     Wait for the node to restart and return without the error.

     Wait an additional 30 minutes for multipath drives to recover on the host.

     Repeat this process for each node individually until you clear the error on all nodes.