IBM Storwize V7000 Unified Problem Determination Manual page 287

Table 89. Understanding the node canister status LEDs (continued)
LED state
Power
Fault (amber)
(green)
On Off
On Flashing
System
status (green)
The node canister is in standby mode. (The Storwize V7000
Unified software is not running.)
Off It is safe to remove or reseat the canister.
Restart the node canister, as described in "Procedure:
Reseating a Storwize V7000 Gen2 node canister" on page 278.
The node canister is in candidate state. The node is not doing
I/O in the system.
Unless indicated by the battery status LED, it is safe to
remove or reseat the canister. See Table 90 on page 261.
If the node state is candidate and the system is running on
Flashing
the other node canister, the candidate node is automatically
added to the system.
If both node canisters are in candidate state, determine
whether you must recover the system or create a new
system.
The node is doing an emergency shutdown operation, using
the battery for power, after detecting a loss of power from
the power supply units.
Wait for the emergency shutdown operation to complete. If
the partner node has also done an emergency shutdown
Flashing fast
operation, there was most likely a loss of input power to
both enclosure power supply units and the system restarts
when the input power is restored. Otherwise, there might be
a fault the node canister, enclosure midplane, or power
supply units.
The Storwize V7000 Unified software is running, and the
node canister is participating in the system.
On
The canister must not be removed.
This is the normal operational LED state.
The node canister is in standby mode. (The Storwize V7000
Unified software is not running.)
Off
It is safe to remove or reseat the canister.
The Identify function for this canister has been activated. To
determine if it is safe to remove the canister, use the
Flashing
management GUI or service assistant to turn off the Identify
function, then check the node canister status LEDs again.
Description
Chapter 5. Control enclosure
259