System-Error Led; Information-Error Led; Location Led; Hard Disk Drive Activity Led - IBM 2145-8F4 Installation Manual

System-error LED

Information-Error LED

Location LED

Hard disk drive activity LED

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Power control button

Power LED

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IBM System Storage SAN Volume Controller: Installation Guide
The system-error LED is illuminated when an error is detected by the system
board.
This amber LED lights up if the SAN Volume Controller hardware detects a fatal
error that requires a new field replaceable unit (FRU).
Note: Press the release latch to view the light path diagnostic panel, which will
help you to isolate the faulty FRU.
When the information-error LED is lit, a non-critical event has occurred.
Check the light path diagnostics panel and the error log. Light path diagnostics are
described in more detail in the light path maintenance analysis procedure (MAP).
The SAN Volume Controller does not use the location LED.
When it is lit, the green hard disk drive activity LED indicates that the hard disk
drive is in use.
Hard disk drive activity is shown on the hard disk drive itself and also on the
hard disk drive activity LED.
The power control button switches on or switches off the main power to the SAN
Volume Controller 2145-8F2 or SAN Volume Controller 2145-8F4.
To turn on the power, press and release the power control button.
To turn off the power, press and release the power control button.
Note: If you press the power control button and do not release it, the SAN Volume
Controller will malfunction.
The green power LED indicates the power status of the SAN Volume Controller.
The properties of the green power LED are as follows:
Off One or more of the following are true:
v No power is present at the power supply input
v The power supply has failed
v The LED has failed
The SAN Volume Controller is powered on.
On
Flashing
The SAN Volume Controller is turned off but is still connected to an input
power source.
Note: A power LED is also on the rear of the server.