HP NetServer AA 4000 HP NetServer AA 6200 Solution Release 3.0 Administrator&a - Page 33

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. IOPx Powered on and passes POST IOPy Powered on and passes POST Windows NT is loaded. Endurance software is loaded. Windows NT is loaded. Endurance software is loaded. IOPx and IOPy communication is established. IOPs join. CE boot starts. 17