9. When both ends of a SAS cable are correctly connected, the green link-LED
next to the connected SAS ports are lit.
For example, Figure 78 on page 91 shows the LEDs of expansion canister 1 on a
2077-92F expansion enclosure. The SAS cable is successfully inserted in to port
1 (input); port 2 (output) does not contain a SAS cable.
Figure 77. Example of SAS cables routed through the cable management arms
90 Storwize V5000 Gen2: Quick Installation Guide