Node canister SAS ports and indicators

Two serial-attached SCSI (SAS) ports are located side by side in the rear of the node canister.

The SAS ports are numbered 1 on the left and 2 on the right as shown in Figure 1. Port 1 is used if you add one expansion enclosure. Port 2 is used if you add a second expansion enclosure. Each port provides four data channels.

Note: The reference to the left and right locations applies to canister 1, which is the upper canister. The port locations are inverted for canister 2, which is the lower canister.

Figure 1. SAS ports on the node canisters.
This figure shows the location of the SAS ports on the node canisters.

SAS ports must be connected to Lenovo Storage V7000 enclosures only.

Four LEDs are located with each port. Each LED describes the status of one data channel within the port. The data channel number is shown with the LED.

Table 1. SAS port LEDs on the node canister
LED state	Description
Off	No link is connected.
Flashing	The link is connected and has activity.
On	The link is connected.