5U expansion enclosure LEDs and indicators

The 5U expansion enclosure has several sets of LEDs that provide information about the overall status of the enclosure, power, drives, fans, canisters, and SAS connections.

A 5U expansion enclosure has sets of LEDs on the front and rear of the enclosure. Inside of the expansion enclosure, LEDs also indicate the status of the drives and each secondary expander module.

LEDs on the front of the expansion enclosure

As Figure 1 shows, the front of the 5U expansion enclosure contains LEDs for the display panel ( 1 ) and for each of the power supply units ( 3 ).
Figure 1. LEDs on the front of the expansion enclosure
Expansion canister front LEDs
  •  1  Display panel LEDs
  •  2  Rack retention thumb screws
  •  3  Power supply unit LEDs
  •  4  Power supply units (PSUs)
  •  5  PSU fascia (1U)
  •  6  Front fascia (4U)
The display panel ( 1 ) contains three LEDs that describe the operational status of the expansion enclosure. Table 1 describes the function and meaning of the LEDs on the front display panel.
Table 1. Display panel LEDs
Function Color Status Description
Power Green On The expansion enclosure power is on; this LED is controlled by the expansion enclosure.
Off The expansion enclosure power is off.
Identify Blue On Identifies the expansion enclosure; this LED is controlled by the system. Use the management GUI or service interface to identify an enclosure.
Off The expansion enclosure is operating normally.
Enclosure fault Amber On The expansion enclosure is coming up or a fault is detected against a component within the enclosure.
Off No faults are detected.

The 5U expansion enclosure contains two PSUs ( 4  in Figure 1) that are accessible from the front of the enclosure. Each PSU has its own a set of LEDs, as shown in Figure 2.

Figure 2. LEDs on the front of a power supply unit
Power supply unit LEDs
  •  1  Input power
  •  2  DC power
  •  3  Fault indicator
Table 2 explains the function and status that is indicated by each of the LEDs. The power cords for each PSU are accessible from the rear of the expansion enclosure ( 1 ), as shown in Figure 5.
Table 2. Power supply unit LEDs
Function Color Status Description
 1  Input power Green On The input voltage is within specification.
Off No power input detected.
 2  DC power Green On DC power outputs are within specification.
Off DC power is not available.
 3  Fault Amber On A fault is detected in the PSU.
Off No faults are detected.

LEDs inside of the expansion enclosure

Each of the drives and secondary expansion modules within the 5U expansion enclosure has two LED indicators.

Figure 3 shows the components of a drive assembly. Each drive has an online indicator ( 2 ) and fault indicator ( 3 ).

Figure 3. LEDs on a drive assembly
LEDs on a drive
Table 3 describes the meaning of the LEDs on each drive.
Table 3. LED indicators on drives
Function Color Status Description
 2  Activity Green On The drive is ready to be used.
Flashing The drive is operating and I/O is occurring.
Off The drive is not installed or an installed drive is not ready to be used.
 3  Fault Amber On A fault occurred on the drive. The LED is turned off when the drive is removed and replaced.
Flash The drive is being identified, a fault might or might not be detected.
Off The installed drive is operating normally.

Figure 4 shows the LEDs on a secondary expansion module.

Figure 4. LEDs on a secondary expansion module
LEDs on a secondary expansion module
  •  1  Online indicator
  •  2  Fault indicator
Table 4 describes the meaning of the LEDs on each secondary expansion module.
Table 4. LED indicators on secondary expansion modules
Function Color Status Description
 1  Power Green On The secondary expansion module is receiving power.
Flashing Not used.
Off The secondary expansion module is not receiving power.
 2  Fault Amber On Not used.
Flash The secondary expansion module is being identified.
Off The secondary expansion module is operating normally.

LEDs on the rear of the expansion enclosure

Figure 5 shows the rear view of a , expansion enclosure. LEDs on the rear of the enclosure provide information about each fan module, each expansion canister, and SAS links.

Figure 5. LEDs on the back of the expansion enclosure
LEDs on the back of expansion enclosure

The expansion enclosure has four fans. Each fan has one LED; for example, Figure 5 shows the location of the LED ( 5 ) for fan number four. When a fan is operating normally, the LED is not lit. If a fault is detected, the amber LED is lit.

As Figure 5 also shows, the expansion enclosure contains two expansion canisters. Each expansion canister contains its own set of LEDs, as shown in Figure 6. The LEDs provide status information about the expansion canister itself and the SAS connections.

Figure 6. LEDs on the back of the expansion canister
Expansion canister LEDs
  •  1  Canister fault
  •  2  Canister status
  •  3  Canister power
  •  4  and  6  SAS link fault
  •  5  and  7  SAS link operational
  •  8  Canister release handles
Table 5 describes the values and meaning of each LED.
Table 5. Expansion canister and SAS port LEDs
Name Color State Meaning
 1  Canister fault Amber Off Normal operation.
On A fault was detected.
Flashing The expansion canister is being identified. A fault might or might not be detected.
 2  Canister status Green Off Canister is off.
On Normal operation.
Flashing A vital product data (VPD) error occurred.
 3  Canister power Green Off Canister is off.
On Canister is receiving power.
 4  and  6  SAS link fault Amber Off No faults are detected. All four phys have a link connection.
On Several error conditions are possible:
  • Only 1, 2, or 3 phys are connected, but not all 4.
  • The phys are not operating at the same speed.
  • All phys are not connected to the same remote port. One or more of the connected lanes are attached to a different address.
 5  and  7  SAS link operational Green Off No link connection on any lane. The connection is down.
On The SAS link is active. At least one of the four lanes is connected.