2U expansion enclosure indicators

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The 2U expansion enclosure has several sets of Light-Emitting Diodes (LEDs) that provide information about the overall status of the enclosure, power, drives, canisters, and SAS connections.

LEDs on the front of the expansion enclosure

System Status LEDs
Labels and indicators on the left end cap of the expansion enclosure provide information about the enclosure status. When multiple enclosures are in a rack, the serial number is used to identify the enclosure that is being referenced.
Figure 1. Left enclosure end cap
Enclosure health LEDs

Table 1 summarizes the possible meanings of each indicator.

Table 1. Summary of LED Indicators
Indicator Name Callout Color Symbol Meaning
Control enclosure operational  1  Green
This icon shows the power on LED on the enclosure end cap.
  • Off - There is no external power to the enclosure.
  • Slow flash - The enclosure is in a stand by state.
  • On - There is AC power to the enclosure and at least one canister is not in standby mode.
Identify enclosure  2  Blue
This icon shows the identify LED on the enclosure end cap.
  • Off - The enclosure is not being identified.
  • On - The enclosure is set to be identified.
Enclosure fault  3  Amber
This icon shows the fault LED on the enclosure end cap.
  • Off - There are no isolated FRU failures in the enclosure.
  • On - There are one or more isolated FRU failures in the enclosure requiring service or replacement.
Check Log  4  Amber   Not used in Storage Virtualize implementation
Drive Status LEDs
Each drive on the expansion enclosure has two light-emitting diode (LED) indicators; they have no controls or connectors. Figure 2 shows the location of the LEDs on a SFF 2.5-inch drive.
Figure 2. LED indicators on a vertical 2.5 in. (6.35 cm) drive
LED indicators on a vertical drive
Table 2 describes the LED status values for the two LEDs on each drive.
Table 2. Drive LED status
LED name Callout Color State Meaning
Fault  1  Amber OFF No known fault exists.
FLASHING The drive is being identified; a fault might or might not exist.
ON A fault exists on the drive.
Activity  2  Green OFF The drive is not ready for use.
FLASHING The drive is ready. Activity is in progress.
ON The drive is ready. No activity is in progress.

LEDs on the rear of the expansion enclosure

Canister indicators

Each expansion canister has three LED indicators that provide status and identification for the expansion canister.

Three LEDs are located in a horizontal row on the right side (when viewed from the rear) of the expansion canister. Figure 3 shows the expansion canister indicators.
Figure 3. Expansion canister LEDs
Expansion canister LEDs

Table 3 describes the function and meaning of each indicator.

Table 3. Expansion canister LED descriptions
Name Description Color Symbol
 1  Power Indicates whether the expansion canister has power.
  • If the LED is on, the canister has power.
  • If the LED is off, the canister does not have power.
 Green
The power symbol represents the input power LED.
 2  Status Indicates whether the expansion canister is active.
  • If the LED is on, the canister is active.
  • If the LED is off, the canister is not active.
  • If the LED is flashing, there is a vital product data (VPD) error.
 Green
The status symbol represents the clustered system status LED.
 3  Fault Indicates whether a fault is present and identifies the expansion canister.
  • If the LED is on, a fault exists.
  • If the LED is off, no fault exists.
  • If the LED is flashing, the expansion canister is being identified. This status might or might not be a fault.
 Amber
The exclamation mark represents the fault LED.
SAS port indicators
Each of the two SAS ports on the expansion canister has two status LEDs above the port: Link (left-hand indicator) and Fault (right-hand indicator), as shown in Figure 4.
Figure 4. SAS ports and LEDs at the rear of an expansion canister
SAS ports and LEDs at rear of the expansion canister
Figure 3 describes the LED states for each of the two LEDs per SAS port. The link LED is on the left of each set of ports.
Table 4. SAS port LEDs on the expansion canister
Name Color State Meaning
SAS Port 1 Link Green OFF No physical link connection on any phys. The connection is down.
ON There is a connection on at least one physical lane. At least one of the lanes to that connector is up.
SAS Port 1 Fault Amber OFF No fault. All four physical lanes have a link connection.
ON This value indicates a number of different error conditions:
  • One or more, but not all, of the four physical lanes are connected.
  • Not all four physical lanes are at the same speed.
  • One or more of the connected physical lanes are attached to an address different from the others.
SAS Port 2 Link Green OFF No link connection on any physical lanes. The connection is down.
ON There is a connection on at least one physical lane. At least one of the lanes to that connector is up.
SAS Port 2 Fault Amber OFF No fault. All four physical lanes have a link connection.
ON This value indicates a number of different error conditions:
  • One or more, but not all, of the four physical lanes are connected.
  • Not all four physical links are at the same speed.
  • One or more of the connected physical links are attached to an address different from the others
Power supply indicators
Each power supply unit has four LED indicators that are described in Table 5.
Table 5. Power supply LEDs
Name Label Color Description
Input status
Green
Off
No input power detected
On
Direct current input power detected
Output status
Green
Off
PSU is not providing DC output power
On
PSU is providing DC output power
Fault
Amber
Off
No fault detected
On
PSU fault detected
Flash
PSU is being identified. A fault might have been detected.
(None)
Blue Not used