Cabling shelves for a hot-add

How you cable an IOM12 shelf to a stack of IOM6 shelves depends on whether the IOM12 shelf is the initial IOM12 shelf, meaning no other IOM12 shelf exists in the stack, or whether it is an additional IOM12 shelf to an existing mixed stack, meaning one or more IOM12 shelves already exists in the stack. It also depends on whether the stack has multipath HA, multipath, single-path HA, or single-path connectivity.

Before you begin

About this task

Procedure

  1. Physically identify the logical last shelf in the stack.
    Depending on your platform model and stack connectivity (multipath HA, multipath, single-path HA, or single-path), the logical last shelf is the shelf having controller-to-stack connections from controller SAS ports B and D, or it is the shelf having no connections to any controllers (because the controller-to-stack connectivity is to the logical top of the stack, through the controller SAS ports A and C).
  2. If the IOM12 shelf you are hot-adding is the initial IOM12 shelf being added to the IOM6 stack, meaning no other IOM12 shelf exists in the IOM6 shelf stack, complete the applicable substeps.
    Otherwise, go to step 3.
    If your IOM6 stack connectivity is... Then...
    Multipath HA or multipath, or single-path HA with controller connectivity to the logical last shelf (including stretch MetroCluster configurations)
    1. Disconnect the controller-to-stack cable from the last IOM6 shelf IOM A circle port to the controller or bridge.

      Make note of the controller port.

      Put the cable aside. It is no longer needed.

      Otherwise; go to substep e.

    2. Cable the shelf-to-shelf connection between the last IOM6 shelf IOM A circle port (from substep a) to the new IOM12 shelf IOM A port 1.

      Use a SAS copper QSFP-to-Mini-SAS HD cable.

    3. If you are hot-adding another IOM12 shelf, cable the shelf-to-shelf connection between the IOM12 shelf IOM A port 3, of the shelf you just cabled, and the next IOM12 shelf IOM A port 1.

      Use a SAS copper Mini-SAS HD-to-Mini-SAS HD cable.

      Otherwise, go to the next substep.

    4. Reestablish the controller-to-stack connection by cabling the same port on the controller or bridge (in substep a) to the new last IOM12 shelf IOM A port 3.

      Use a SAS copper QSFP-to-Mini-SAS HD cable or Mini-SAS HD-to-Mini-SAS HD cable, as appropriate for the port type on the controller.

    5. Repeat substeps a through d for IOM B.

      Otherwise, go to step 4.

    Bridge-attached connectivity in a MetroCluster configuration
    1. Disconnect the bottom bridge-to-stack cable from the last IOM6 shelf IOM A circle port to the bridge.

      Make note of the bridge port.

      Put the cable aside. It is no longer needed.

      Otherwise; go to substep e.

    2. Cable the shelf-to-shelf connection between the last IOM6 shelf IOM A circle port (from substep a) to the new IOM12 shelf IOM A port 1.

      Use a SAS copper QSFP-to-Mini-SAS HD cable.

    3. If you are hot-adding another IOM12 shelf, cable the shelf-to-shelf connection between the IOM12 shelf IOM A port 3, of the shelf you just cabled, and the next IOM12 shelf IOM A port 1.

      Use a SAS copper Mini-SAS HD-to-Mini-SAS HD cable.

      Otherwise, go to the next substep.

    4. Repeat substeps b and c to cable the shelf-to-shelf connections for IOM B.
    5. Reestablish the bottom bridge-to-stack connection by cabling the same port on the bridge (in substep a) to the new last IOM12 shelf IOM A port 3.

      Use a SAS copper QSFP-to-Mini-SAS HD cable or Mini-SAS HD-to-Mini-SAS HD cable, as appropriate for the port type on the controller.

    6. Go to step 4.
    Single-path HA or single-path with no controller connectivity to the logical last shelf
    1. Cable the shelf-to-shelf connection between the last IOM6 shelf IOM A circle port and the new IOM12 shelf IOM A port 1.

      Use a SAS copper QSFP-to-Mini-SAS HD cable.

    2. Repeat the above substep for IOM B.
    3. If you are hot-adding another IOM12 shelf, repeat substeps a and b.

      Otherwise, go to step 4.

  3. If the IOM12 shelf you are hot-adding is an additional IOM12 shelf to an existing mixed stack, meaning one or more IOM12 shelves already exists in the stack, complete the applicable substeps.
    If your mixed stack connectivity is... Then...
    Multipath HA or multipath, or single-path HA with controller connectivity to the logical last shelf, or bridge-attached connectivity in a MetroCluster configuration
    1. Move the controller-to-stack cable from the last IOM12 shelf IOM A port 3 to the same port on the new last IOM12 shelf.
    2. If you are hot-adding one IOM12 shelf, cable the shelf-to-shelf connection between the old last IOM12 shelf IOM A port 3 to the new last IOM12 shelf IOM A port 1.

      Use a SAS copper Mini-SAS HD-to-Mini-SAS HD cable.

      Otherwise, go to the next substep.

    3. If you are hot-adding more than one IOM12 shelf, cable the shelf-to-shelf connection between the old last IOM12 shelf IOM A port 3 and the next IOM12 shelf IOM A port 1, and then repeat this for any additional IOM12 shelves.

      Use additional SAS copper Mini-SAS HD-to-Mini-SAS HD cables.

      Otherwise, go to the next substep.

    4. Repeat substeps a through c for IOM B.

      Otherwise, go to step 4.

    Bridge-attached connectivity in a MetroCluster configuration
    1. Move the bottom bridge-to-stack cable from the old last IOM12 shelf to the same port on the new last IOM12 shelf.
    2. Cable the shelf-to-shelf connection between the old last IOM12 shelf IOM A port 3 and the next IOM12 shelf IOM A port 1, and then repeat this for any additional IOM12 shelves.

      Use a SAS copper Mini-SAS HD-to-Mini-SAS HD cable.

    3. Cable the shelf-to-shelf connection between the old last IOM12 shelf IOM B port 3 and the next IOM12 shelf IOM B port 1, and then repeat this for any additional IOM12 shelves.
    4. Go to step 4.
    Single-path HA or single-path with no controller connectivity to the logical last shelf
    1. Cable the shelf-to-shelf connection between the last IOM12 shelf IOM A port 3 and the new last IOM12 shelf IOM A port 1.

      Use a SAS copper Mini-SAS HD-to-Mini-SAS HD cable.

    2. Repeat the above substep for IOM B.
    3. If you are hot-adding another IOM12 shelf, repeat substeps a and b.

      Otherwise, go to step 4.

  4. Verify that the SAS connections are cabled correctly.
    If any cabling errors are generated, follow the corrective actions provided.

    NetApp Downloads: Config Advisor

  5. If you disabled automatic drive assignment as part of the preparation for this procedure, you need to manually assign drive ownership and then re-enable automatic drive assignment, if needed.

    Otherwise, you are done with this procedure.

    Note: All MetroCluster configurations require manual drive assignment.

    Completing the hot-add