Server Management Subsystem Hardware Overview; Disk Drive Led Location; Disk Drive Leds - HP rp7420 Service Manual

Figure 5-10 Disk Drive LED Location
Table 5-10 Disk Drive LEDs
Activity LED
Off
Green
Green
Off
Off
Off
Off

Server Management Subsystem Hardware Overview

Server management for the HP 9000 rp7420 server is provided by an MP on the core I/O board.
The server management hardware is powered by standby power that is available whenever the
server is plugged into primary AC power. This enables service access even if the DC power to
the server is switched off.
The MP communicates with the server subsystems, sensors, and PDC by internal buses. It also
communicates with the operating console and session gettys by universal asynchronous
receiver-transmitters (UARTs) on the core I/O PCI bus.
Connection to the management processor is by way of two I/O paths:
• An RS-232 port for a local terminal
• An RS-232 port for a modem connection
• A 10/100/1000 baseT LAN port (Web console)
When the server is configured with one core I/O board, that board must be in slot 0, since the
primary MP is always the MP on the core I/O board in slot 0.
When the server is configured for two partitions, it must contain two core I/O boards, one for
each partition. It also contains two MPs. In this case, the MP in slot 0 is the primary MP and
provides all of the server management functions. The MP on the core I/O board in slot 1 is a
secondary MP and redirects the operating system gettys to the primary MP over an internal
MP-to-MP link. All external connections to the MP must be to the primary MP in slot 0. The
secondary MP ports are disabled.
For high availability (HA), the server powers on and powers off without an MP. Booting HP-UX
without an MP depends on the ability of the operating system to boot without a console getty.
Thus, in a two-partition system, the partition with a failed MP might not boot, since the MP
provides the console getty.
The server configuration cannot be changed without the MP.
78 Troubleshooting
Status LED Flash Rate
Green Steady
Off Steady
Off Flutter at rate of
activity
Yellow Flashing at 1 Hz
or 2 Hz
Yellow Flashing at 0.5 Hz
or 1 Hz
Yellow Steady
Off LEDs off
Description
Normal operation, power applied
Green stays on during foreground drive self-test
I/O Disk activity
Predictive failure, needs immediate investigation
Operator inducing manually
Module fault, critical
Unit not powered or installed