Connecting 2U expansion enclosures to the control enclosure

If you have 2U expansion enclosures in the rack, you must connect them to the control enclosure.

About this task

This task applies if you are installing one or more expansion enclosures. Each control enclosure in the system can manage two sets of expansion enclosures; each set can consist of a maximum of 10 expansion enclosures. Therefore, each control enclosure can manage up to 20 expansion enclosures. A system that contains two control enclosures can have up to 40 expansion enclosures.

Each set of expansion enclosures is connected together sequentially through the IN and OUT SAS ports, forming a chain with a control enclosure at the end of the chain.

Note: When you connect SAS cables between enclosures, review and follow the guidelines to ensure that your configuration is valid. Do not begin connecting the cables until you read SAS cabling guidelines.

Procedure

To install the cables, complete the following steps.

  1. Using the supplied SAS cables, connect the Storwize® V7000 Gen2 control enclosure to the expansion enclosure at rack position 1, as shown in Figure 1.
    1. Connect SAS port 1 of the left node canister in the control enclosure to SAS port 1 of the left expansion canister in the first expansion enclosure.
    2. Connect SAS port 1 of the right node canister in the control enclosure to SAS port 1 of the right expansion canister in the first expansion enclosure.
    Figure 1. Connecting the SAS cables to a Storwize V7000 Gen2 control enclosure
    Image of V7000 Gen2 control and expansion enclosures that are connected by expansion enclosure attachment cables
  2. Using the supplied SAS cables, connect the Storwize V7000 Gen3 control enclosure to the expansion enclosure at rack position 1, as shown in Figure 2.
    1. Connect SAS port 1 of the upper node canister in the control enclosure to SAS port 1 of the left expansion canister in the first expansion enclosure.
    2. Connect SAS port 1 of the lower node canister in the control enclosure to SAS port 1 of the right expansion canister in the first expansion enclosure.
    Figure 2. Connecting the SAS cables to Storwize V7000 Gen3 control enclosure
    Image of Storwize V7000 Gen3 control enclosure that is connected by expansion enclosure attachment cables
  3. To add a second expansion enclosure chain to the control enclosure, use the supplied SAS cables to connect the control enclosure to the expansion enclosure at rack position 2. Refer to Figure 1 for an example.
    1. Connect SAS port 2 of the left node canister in the control enclosure to SAS port 1 of the left expansion canister in the second expansion enclosure.
    2. Connect SAS port 2 of the right node canister in the control enclosure to SAS port 1 of the right expansion canister in the second expansion enclosure.
  4. To add a second expansion enclosure chain to the Storwize V7000 Gen3 control enclosure, use the supplied SAS cables to connect the control enclosure to the expansion enclosure at rack position 2. See Figure 2 for an example.
    1. Connect SAS port 3 of the upper node canister in the control enclosure to SAS port 1 of the left expansion canister in the second expansion enclosure.
    2. Connect SAS port 3 of the lower node canister in the control enclosure to SAS port 1 of the right expansion canister in the second expansion enclosure.
  5. If more expansion enclosures are installed, connect each one to the previous expansion enclosure in a chain. Use two Mini SAS HD to Mini SAS HD cables, as shown in Figure 1.
    Note: A control enclosure can support up to 20 expansion enclosures (10 above the control enclosure and 10 below the control enclosure).
  6. If more control enclosures are installed, repeat this cabling procedure on each control enclosure and its expansion enclosures.