IBM DS3500, Installation, User'S, And Maintenance Manual

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Ethernet speed LED
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.
Ethernet activity LED
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.
SAS link service action LED (amber)
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.
SAS link up LED (green)
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.
Cache active LED (green)
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.
Fault LED (amber)
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.
OK to remove LED (blue)
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.
Battery charging LED (green)
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.
Battery fault LED (amber)
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.
iSCSI activity LED (green)
When this LED is lit, it indicates that the link is established with the controller. When this LED is
flashing, there is activity on this port. When this LED is off, no link is established with this port.
iSCSI speed LED (amber)
When this LED is lit, it indicates that the port is operating at 1000 Mbps. When this LED is off, it
indicates that the speed of the port is 100 Mbps.
iSCSI
activity
LED iSCSI
speed
LED
Figure 4-8. iSCSI host port adapter LEDs
4-10
System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide