IBM TotalStorage DS4400, User Manual, Page: 60 / 124

It is important that you check all the indicator lights on the front and back of the
DS4400 Storage Server a few minutes after you turn on the power. After you turn
on the power, the indicator lights might blink intermittently. Wait until the DS4400
Storage Server completes its power up before checking for faults. It can take up to
15 minutes for the battery to complete its self-test and up to 24 hours to fully
charge, particularly after an unexpected power loss of more than a few minutes.
The indicator lights for the components of the DS4400 Storage Server are
described in the following sections.
Storage server indicator lights
The storage server has five indicator lights, as shown in Figure 24. To view the
storage server indicator lights, you do not have to remove the DS4400 Storage
Server bezel.
DS4400
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.
Table 10 on page 29 describes the storage server indicator lights.
Figure 24. Storage server indicator lights
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IBM TotalStorage DS4400 Fibre Channel Storage Server: User’s Guide