HP Surestore Disk Array FC60 HP SureStore E Disk Array FC60 Service Manual (A5 - Page 36
The controller module connects to the host via Fibre Channel, and to the disk enclosures
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Each controller module has ten LEDs. See Figure 12. One LED identifies the controller module's power status. A second LED indicates when a fault is detected. The remaining eight LEDs provide detailed fault condition status. The most significant LED, the heartbeat, flashes approximately every two seconds beginning 15 seconds after power-on. "Troubleshooting" on page 207 contains additional information on controller LED operation. The controller module connects to the host via Fibre Channel, and to the disk enclosures via LVD SCSI. Each controller must have a unique host fibre ID number assigned using the ID switches on the back of the controller modules. See "Installation" on page 111 for more information on setting host IDs. Figure 12 Controller Module LEDs 36 Array Controller Enclosure Components