HP NetServer AA 4000 HP Netserver AA Solution Administrator's Guide v - Page 35

Endurance Boot Process, Overview of IOP Boot Process

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Endurance Boot Process When the IOPs and CEs in an Endurance server are powered on, they automatically start a boot process that results in loading both the Windows operating system and the Endurance software. When powered on, the IOPs pass power-on self test (POST) and load the Windows operating system and the Endurance 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 Endurance 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. IOPx Powered on and passes POST IOPy Powered on and passes POST Windows is loaded. Endurance software is loaded. Windows is loaded. Endurance software is loaded. IOPx and IOPy communication is established. IOPs join. CE boot starts. Figure 2-3 Overview of IOP Boot Process Endurance Overview 2-7

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Endurance Overview
2-7
Endurance Boot Process
When the IOPs and CEs in an Endurance server are powered on, they automatically start a boot
process that results in loading both the Windows operating system and the Endurance software.
When powered on, the IOPs pass power-on self test (POST) and load the Windows operating
system and the Endurance 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
Endurance 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
.
Figure 2-3
Overview of IOP Boot Process
IOPy
IOP
x
and IOP
y
communication is
established.
IOPx
Powered on and
passes POST
Windows
is loaded.
Endurance
software is loaded.
Powered on and
passes POST
Windows
is loaded.
Endurance
software is loaded.
IOPs join.
CE boot starts.