HP 6400/8400, User Manual

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2. Disk drive release 1. Rack-mounting thumbscrew
4. UID push button 3. Drive LEDs
5. Enclosure status LEDs
Figure 2 Disk enclosure front view without bezel ears
.
2. Power supply 1 status LED 1. Power supply 1
4. Enclosure product number and serial number 3. Fan 1
6. I/O module A 5. Fan 1 status LED
8. Rear UID push button 7. I/O module B
10. Fan 2 9. Enclosure status LEDs
12. Power supply 2 11. Power push button
Figure 3 Disk enclosure rear view
.
I/O modules
Two I/O modules provide the interface between the disk enclosure and the host controllers, ( Figure
4 ). For redundancy, only dual-controller, dual-loop operation is supported. Each controller is connected
to both I/O modules in the disk enclosure.
Each I/O module has two ports that can transmit and receive data for bidirectional operation.
Activating a port requires connecting a Fibre Channel cable to the port. The port function depends
upon the loop.
EVA6400/8400 hardware 18