Controller Leds - IBM DS3500 Installation, User & Maintenance Manual

Figure 70. Controller LEDs
Ethernet speed LED
Ethernet activity LED
SAS link service action LED (amber)
SAS link up LED (green)
Cache active LED (green)
Fault LED (amber)
OK to remove LED (blue)
Battery charging LED (green)
Battery fault LED (amber)
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System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide
When this LED is lit, it indicates that the Ethernet speed between the
controller and the management workstation is 1000 Mbps. When this LED
is off, it indicates that the Ethernet speed is 100 Mbps.
When this LED is lit, it indicates that the link is established between the
controller and the management workstation. When this LED is flashing,
there is activity between the controller and the management workstation.
When this LED is off, no link is established between the controller and the
management workstation.
When this LED is lit, it indicates a problem with the SAS link that requires
service action. The normal condition of this LED is off.
When this LED is lit, it indicates that the link is established between the
controller and a host. When this LED is flashing, it indicates activity on the
link. When this LED is off, no link is established.
When this LED is lit, it indicates that battery backup has been enabled and
data is in the memory cache. When this LED is blinking, cache offload is in
process. When this LED is off, caching is turned off and no data is in the
memory cache.
When this LED is lit, it indicates that a fault has occurred in the controller
and the controller must be replaced. The normal condition of this LED is off.
When this LED is lit, it indicates that it is safe to remove the controller from
the DS3500; no activity is taking place, and no data remains in the memory
cache. The normal condition of this LED is off.
When this LED is lit, the battery is fully charged. When this LED is blinking,
the battery is charging. When this LED is off, the battery either failed or has
been removed from the controller.
When this LED is lit, it indicates that the battery fails to hold a charge and
should be replaced. The normal condition of this LED is off.