Figure 12-18 Enclosure canister status LEDs Figure 12-17 Expansion canister SAS ports Table 12-5 SAS port status LEDs Table 12-6 Expansion canister status LEDs Name and  position Color State Meaning Power (left) Green Solid The canister is receiving power. Off No power is available, or the power is coming from  the battery. Name and  position Color State Meaning Fault (left) Amber Solid One of the following errors exists: GLYPH<SM590000> Only 1, 2, or 3 lanes (phys) have a connection. GLYPH<SM590000> Not all of the lanes (phys) that have a  connection are running at the same speed. GLYPH<SM590000> Not all of the lanes (phys) that have a  connection are attached to the same address. GLYPH<SM590000> An unsupported device is connected to the port. Off No fault exists. All four lanes (phys) have a  connection. Link (right) Green Solid A connection exists on at least one lane (phy). Off No connection exists on any lane (phy). Canister status Each port has two LEDs that display the status of its activity. Their meanings are shown in  Table 12-5. The status of each expansion canister is displayed by three LEDs on the back of the unit, as  shown in Figure 12-18. The meaning of each LED is listed in Table 12-6.  Chapter 12. RAS, monitoring, and troubleshooting  635