Using The Status Leds To Monitor The System; Table 3-4. Status Leds And Their Functions - HP NonStop NS-series Operation Manual

Overview of Monitoring and Recovery

Using the Status LEDs to Monitor the System

Status LEDs on the various enclosures and system components light during certain
operations, such as when the system performs a series of power-on self-tests (POSTs)
when a server is first powered on.
diodes (LEDs) and their functions.
Table 3-4. Status LEDs and Their Functions (page 1 of 3)
Location
Disk drive
Disk drive, fibre
channel
EMU
HP Integrity NonStop NS-Series Operations Guide —529869-005
Table 3-4
LED Name Color
Power-on Green
Activity Yellow or
amber
Drive Ready Green
(top green)
Drive Online Green
(middle green)
Drive Failure Amber
(bottom
amber)
All
Heartbeat Left Green
Power Middle
Green
3- 20
Using the Status LEDs to Monitor the System
lists some of the status light-emitting
Function
Lights when the disk drive is receiving
power.
Lights when the disk drive is executing a
read or write command.
Flashes when drive is starting. (At the
same time, the middle green light is lit and
the bottom amber light is lit.)
Flashes when drive is operational and
performing a locate function.
Flashes when drive is inactive or in error
condition. When this occurs, verify the
loop and replace the drive, if necessary.
If all lights are on and none are flashing,
the drive is not operational. Perform the
following actions:
1. Check FCSA. Replace if defective.
2. Check FC-AL I/O module. Replace if
defective.
3. Replace drive.
Flashes when EMU is operational and
performing locate. Power might just have
been applied to the EMU, or an enclosure
fault might exist.
On when an EMU fault exists that is not
an enclosure fault.
Off when an EMU fault exists, which could
be or might not be an enclosure fault.
Flashes when EMU is operational and
performing locate.
On when EMU is operational. An EMU or
an enclosure fault might still exist.
Off when power has just been applied to
an enclosure, or when an enclosure fault
exists.