Server Management Subsystem Hardware Overview - HP Integrity rx8620 User's & Service Manual

Troubleshooting

Server Management Subsystem Hardware Overview

Server Management Subsystem Hardware Overview
Server management for the HP Integrity rx8620 Server series is provided by a management processor (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 allows service access even if the DC power to the
server is switched off.
The management processor communicates with the server subsystems, sensors, and platform dependent code
(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 three 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 master
management processor 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
will also contain two MPs. In this case, the MP in slot 0 is the master MP and provides all of the server
management functions. The MP on the core I/O board in slot 1 is a slave MP and redirects the operating
system gettys to the master MP over an internal MP-to-MP link. All external connections to the MP must be
to the master MP in slot 0. The slave MP ports will be disabled.
For high availability (HA), the server powers up and powers down 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 may not boot, since the MP provides the console getty.
The server configuration may not be changed without the MP.
Resetting the MP through a modem connection may cause Admin^M to display on every
Attempting a modem reset (MP command MR) does not clear this incorrect response. This is not experienced
with a telnet connection.
A new Login prompt regains control by following these steps:
Step 1. Enter Admin (case sensitive) and press <
Step 2. A new Login prompt is created.
Step 3. Re-enter Admin <
Step 4. Enter Admin <
Afterwards, the ^M will not return when the
through the modem.
118
> to move on to the Password prompt.
ctrl + enter
> to reach the Main Menu.
ctrl + enter
enter
>< + > keys.
enter ctrl enter
key is pressed. The issue will return if the MP is reset
keystroke.
enter
Chapter 5