HP NetServer AA 4000 HP AA HP Netserver 4000 Reference Guide - Page 48
Using the Right Copy of Windows NT
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HP NetServer AA Using the "Right" Copy of Windows NT The HPAA system features three distinct installations of Windows NT in operation; one each for the IOPs and one for both of the CEs. Remember, the CEs operate in lockstep and use the same copy of Windows NT. Regardless of which CE is being viewed based on the tuple choice, any modifications made to Windows NT on the CE occurs once, but it written to two different disks on each IOP for redundancy. When to use Windows NT on the IOPs When working with the Windows NT operating system on the IOP, it has no bearing on the other IOP. All administrative tasks performed on one IOP for the purposes of the HPAA system most likely have to be performed again on the other IOP. When the HPAA system is first delivered, there are only the default user accounts and groups on the Windows NT operating system on each IOP. The first administrative task would be to change the administrator password as a security precaution on each IOP. During normal operation of the HPAA system, the IOPs do not require any access or adminsitrative use other than to use the Marathon Manager. The Marathon Management Tool is installed on each of the IOPs and it useful for: • Getting a status update on the array from the IOPs perspective • Checking the status of the array in the absence of a working CE • Performing / Issuing Marathon-based administrative commands when the CE is not available The IOPs do support the installation of additional applications, but other than management tools this is not recommended as other applications may impact the availability of the IOP and impact the performance of the overall array. When to use Windows NT on the CEs The short answer is almost always. The copy of Windows NT is the copy that supplies the resources for the client network. It is where all applications are installed. When installing applications and configuring the server to have the tools and accessories needed to optimize performance conditions and services for the network, always think in terms of the CE. Some of the typical administrative tasks in a Windows NT environment to be done on the CE include: • Joining a Domain - The CE copy of Windows NT is typically a stand-alone installation of Windows NT Server. In the network 2-22 Hewlett-Packard Company