LED Descriptions
E F 3 0 1 5 S e t u p G u i d e ( R e v A )
47
When a controller is shut down or otherwise rendered inactive — its Link Status LED
remains illuminated—falsely indicating that the controller can communicate with the host.
Though a link exists between the host and the chip on the controller, the controller is not
communicating with the chip. To reset the LED, the controller must be power-cycled (see
A.4
Power supply LEDs
1
2
AC Model
1
2
DC Model
LED No./Description
Color
State
Definition
1 — Input Source
Power Good
Green
On
Power is on and input voltage is normal.
Off
Power is off, or input voltage is below the minimum
threshold.
2 — Voltage/Fan
Fault/Service Required
Yellow
On
Output voltage is out of range, or a fan is operating
below the minimum required RPM.
Off
Output voltage is normal.
Power redundancy is achieved through two independent load-sharing power supplies. In the
event of a power supply failure, or the failure of the power source, the storage system can
operate continuously on a single power supply. Greater redundancy can be achieved by
connecting the power supplies to separate circuits. DC power supplies are equipped with a
power switch. AC power supplies may or may not have a power switch (the newer model
shown below has no power switch). Whether a power supply has a power switch is
significant to powering on/off.
NOTE :
See
2.2 "Powering on/Powering Off"
for information on
power-cycling enclosures.