Channels, Host expansion channels – IBM System Storage Subsystem DS5020 User Manual
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Heartbeat
LED
Diagnostic
LED
Cache
active
LED
Service
action
required
LED
Service
action
allowed
LED
Host channel
speed - L1 LED
Drive channel
port bypass LED
Drive channel
speed LED
Ethernet link
activity LED
Ethernet link
speed LED
Host channel
speed - L2 LED
Figure 69. LEDs, controls, and connectors of controllers with two standard Fibre Channel
host expansion channels
Heartbeat
LED
Diagnostic
LED
Cache
active
LED
Service
action
required
LED
Service
action
allowed
LED
Host channel
speed - L1 LED
Drive channel
port bypass LED
Drive channel
speed LED
Ethernet link
activity LED
Ethernet link
speed LED
Host channel
speed - L2 LED
Figure 70. LEDs, controls, and connectors of controllers with two standard and two optional
Fibre Channel host expansion channels
Chapter 4. Operating the storage subsystem
105