HP 6100 HP 4x00/6x00/8x00 Enterprise Virtual Array User Guide (5697-0733, Marc - Page 27
I/O modules, I/O module status indicators
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I/O modules Two I/O modules provide the interface between the drive enclosure and the host controllers. See Figure 7 (page 27). They route data to and from the disk drives using Loop A and Loop B, the dual-loop configuration. For redundancy, only dual-controller, dual-loop operation is supported. Each controller is connected to both I/O modules in the drive enclosure. Figure 7 I/O module 1. Status indicators (Upper port, Power, and Lower port) 2. Upper port 3. Lower port The I/O modules are functionally identical, but are not interchangeable. Module A can only be installed at the right end of the enclosure, and module B can only be installed at the left end of the enclosure. See Figure 6 (page 26). Each I/O module has two ports that can both transmit and receive data for bidirectional operation. Activating a port requires connecting a FC cable to the port. The port function depends upon the loop. See Figure 8 (page 27). Figure 8 Input and output ports 1. Loop A lower port 3. Loop B lower port 2. Loop A upper port 4. Loop B upper port I/O module status indicators There are three status indicators on the I/O module. See Figure 7 (page 27). The status indicator states for an operational I/O module are shown in Table 2 (page 28). Table 3 (page 28) shows the status indicator states for a non-operational I/O module. Fibre Channel drive enclosures 27