IBM RS/6000 SP, Руководство по определению проблем

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Chapter 7. Isolating Problems on the SP System
Most of the problems covered in previous chapters can be grouped into four
main categories. Each of those categories has different types of errors.
This chapter provides some reference material, in flowcharts and in overviews,
that gives pointers on how to resolve SP problems in those categories. These
flowcharts and overview charts are not complete; they only present well-known
problems and some hints that can help to identify a problem.
7.1 Isolating Booting Problems
The following sections discuss network booting considerations and problems.
7.1.1 Booting Process Overview
In order to network boot and install nodes, they must be defined as NIM clients
for the NIM master (in NIM jargon), or boot/install server (in SP jargon). When
they are defined, the NIM master allocates the necessary resources for them to
boot and install.
The NIM database contains the NIM objects that define clients and resources,
along with attributes and states for those objects. When setup_server is run,
after set the boot_responds to install or customize for the affected nodes, this
script executes several NIM commands for allocating resources to each client.
Figure 76. Booting Process Overview
The most visible and easily-checked results that happen when resources have
been allocated to clients to boot and install are the /etc/bootptab file and the
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