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

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If the optional Fibre Channel host port adapter is installed in the controller, the host port adapter contains
four additional Fibre Channel host connectors with LEDs.
Fibre Channel speed LEDs 2 Gbps and 4 Gbps
These LEDs in combination indicate the speed of the Fibre Channel host port.
Table 4-1. Fibre Channel port LEDs
2 Gbps LED 4 Gbps LED Host port speed
On Off 2 Gbps
Off On 4 Gbps
On On 8 Gbps
Off Off No SFP module is present or the SFP module is
faulty
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.
10 Gbps iSCSI host port adapter LEDs
10 Gbps iSCSI link rate LED (green, left)
When this LED is lit solid on, it indicates that the link rate is 10 Gbps. When this LED is
off, it indicates that the link rate is 1 Gbps. When this LED is flashing, it indicates that
the link is being acquired.
Figure 4-9. Fibre Channel host port adapter LEDs
SAS link service
action
(amber) LED
SAS link up LED
Figure 4-10. SAS host port adapter LEDs
Chapter 4. Operating the storage subsystem and storage enclosure
4-11