Ds4500 Storage Server Indicator Lights - IBM TotalStorage DS4000 Hardware Maintenance Manual

Power
Green light indicates power is on.
Normal status: On
Problem status: Off
Power supply
Amber light indicates a power supply fault.
Normal status: Off
Problem status: On
Fan
Amber light indicates a fan fault.
Normal status: Off
Problem status: On
Controller
Amber light indicates a controller fault.
Normal status: Off
Problem status: On
Fast Write Cache
Green light indicates data in cache.
Figure 63. DS4500 storage server indicator lights
Table 42 describes the storage server indicator lights.
Table 42. DS4500 storage server indicator lights
Indicator light Color
Power Green
Power supply Amber
fault
Storage server Amber
fan fault
Controller fault Amber
Fast write Green
cache
1
Always use the storage management software to identify the failure.
2
The fast write cache indicator light is on when there is data in the cache and it blinks during a fast write operation.
Normal Problem
operation indicator
On Off
Off On
Off On
Off On
Steady or Software
2
blinking dependent
TotalStorage
Possible conditions suggested by the
problem indicator
v No power to DS4500 storage server
v No power to storage subsystem
v Cables are loose or the switches are off
v Power supply failed, is missing, or is not
fully seated in DS4500 storage server
v Overtemperature condition
v Power supply failed or if the Power supply
is turned off, disconnected, or not fully
seated in DS4500 storage server
v Overtemperature
v No power to DS4500 storage server or
storage subsystem (all indicator lights are
off)
v Storage server fan failed
v Fan and communications module is missing,
unplugged, or failed
v Circuitry failure
v Overtemperature condition
Controller failed; one or more memory
modules failed (SIMMs or DIMMs)
Normal operation is off if:
1
v Cache is not enabled
v Battery is not ready
Chapter 11. Type 1742 DS4500 Storage Server
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