Connecting expansion enclosures to the control enclosure

If you have installed 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.

The number of SAS chains and enclosures varies per each type of system, as shown in Table 1.
Table 1. Summary of SAS chains and enclosures
System Expansion ports Number of SAS chains supported Control enclosures per system Expansion enclosures per chain Maximum Number of Enclosures
Storwize® V5010 and Storwize V5020 Port 1 only 1 1 10 11
Storwize V5030 and Storwize V5030F Port 1 and Port 2 2 1 10 21

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 connecting SAS cables between enclosures, you must follow a list of guidelines to ensure that your configuration is valid. Do not begin connecting the cables until you have read SAS cabling guidelines.

Procedure

To install the cables, complete the following steps.

  1. Using the supplied SAS cables, connect the control enclosure to the expansion enclosure at rack position 1, as shown in the following figures.
    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 shows how to connect SAS cables on a Storwize V5010 system.

    Figure 1. Connecting the SAS cables to a Storwize V5010 system
    Storwize V5010 control and expansion enclosures that are connected by expansion enclosure attachment cables
    Figure 2 shows how to connect SAS cables on a Storwize V5020 system.
    Figure 2. Connecting the SAS cables to a Storwize V5020 system
    Storwize V5020 control and expansion enclosures that are connected by expansion enclosure attachment cables

    Figure 3 shows how to connect SAS cables on a Storwize V5030 or Storwize V5030F system. In this figure, two expansion chains are connected to the Storwize V5030 system.

    Figure 3. Connecting the SAS cables to a Storwize V5030 system
    Storwize V5030 control and expansion enclosures that are connected by expansion enclosure attachment cables
  2. To add a second expansion chain to the Storwize V5030 control enclosure, use the supplied SAS cables to connect the control enclosure to the expansion enclosure at rack position 2, as shown in Figure 3.
    Note: Storwize V5010 and Storwize V5020 systems support only one expansion chain.
    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.
  3. 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 3.
    Note: Storwize V5010 and Storwize V5020 control enclosures can support up to 10 additional expansion enclosures on one chain. Storwize V5030 systems can support two chains. Each chain can contain up to 10 additional expansion closures.
  4. If two Storwize V5030 and Storwize V5030F control enclosures are installed, repeat this cabling procedure on the second control enclosure and its expansion enclosures.