HP NetServer AA 6200 Solution Release 3.0 Administrator's Guide

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Chapter 2 HP NetServer AA Overview
HP NetServer AA Boot Process
When the IOPs and CEs in a server are powered on, they automatically start a boot process that
results in loading both Windows NT and the software.
When powered on, the IOPs pass power-on self test (POST) and load the Windows NT
operating system and the software. The IOP boot process must complete for the CEs to begin
their boot process. (If the CEs are powered up at the same time as the IOPs, the CEs complete
their POST, and then wait for the IOPs to complete their boot process.)
The CEs do not begin booting until the IOPs are available because all I/O devices (including the
CE boot disk) physically reside on the IOPs. By default, both IOPs must be present for the server
to continue the boot process. This ensures that both CEs use the correct copy of the operating
system and do not run independently. The IOP boot process is summarized in Figure 2-3. A
detailed IOP boot process flowchart is in Appendix B.
IOPy
IOPx and IOPy
communication is
established.
IOPx
Powered on and
passes POST
Windows NT
is loaded.
Endurance software
is loaded.
Powered on and
passes POST
Windows NT
is loaded.
Endurance software
is loaded.
IOPs join.
CE boot starts.