Connecting a control enclosure to a host

When you install a control enclosure, you can connect it to a host with SAS cables. You can use onboard host SAS ports on some models or an optional SAS host interface adapter. Note that onboard SAS host ports are not available on all system models.

About this task

Two types of SAS cables are used for host attachment, depending on the requirements of the host.

  • Mini SAS HD to Mini SAS HD (Figure 1)
    Figure 1. Mini SAS HD to Mini SAS HD cable
    Mini SAS HD to Mini SAS HD cable
  • Mini SAS HD to Mini SAS (Figure 2)
    Figure 2. Mini SAS HD to Mini SAS cable
    Mini SAS HD to Mini SAS cable
Note: When you insert a SAS cable, make sure that the connector is oriented correctly.
  • When you connect cables to the SAS ports on the left side of the node canister, the blue pull tab must be below the connector.
  • When you connect a cable to a SAS 4-port host interface adapter, the blue pull tab must be above the connector.
  • Insert the connector gently until it clicks into place. If you feel resistance, the connector is probably oriented the wrong way. Do not force it.
  • When inserted correctly, the connector can only be removed by pulling the tab.

Procedure

To install the cables, complete the following steps.

  1. Connect the required number of SAS cables. Refer to Planning network cable connections to determine the number of cables required.
    Note: When you connect cables to the SAS ports on the left side of the node canister, each host must be connected to both canisters. Both canisters must have the same number of cables connected.
  2. Arrange the cables to provide access to the hardware.
    • USB ports. USB port access is required when you use a USB flash drive to configure the system.
    • The enclosures themselves. Access is required to the hardware for servicing and for safely removing and replacing components by using two or more people.

Results

Figure 3 shows an example configuration with three SAS cables that are connected to each canister.
Figure 3. Example configuration with three SAS cables per canister
Image of control enclosure rear view with three SAS cables per canister
Figure 4 shows an example configuration with two SAS cables that are connected to a SAS 4-port host interface adapter.
Figure 4. Example configuration with two SAS cables that are connected to a SAS 4-port host interface adapter
Image of control enclosure rear view with two SAS cables that are connected to host interface adapter