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A subset of these diagnostics is invoked at system power-up. Optionally,
they may be invoked on every system boot. The subset can also be invoked
by the user through console command.
Note that any of the diagnostics listed above can be individually invoked
by the user through console command.
1.6.4.2
Loadable Diagnostic Execution Environment
The loadable diagnostic executive is essentially a loadable version of the
ROM-based diagnostic executive. It supports loading from any device for
which a console boot driver exists. Once loaded, diagnostics are run and
monitored using the same commands as for the ROM-based diagnostics.
The LFU firmware update utility is a loadable program. This utility up-
dates CPU console and diagnostic firmware, and firmware on I/O adapters.
1.6.4.3
Online Exercisers
The VET online exerciser tool is available for the systems. This tool pro-
vides a unified exercising environment for the operating systems. This ex-
erciser is on each operating system kit. It is invoked as a user-mode pro-
gram.
The following VET exercisers are available:
1-8 Overview
— Cache/memory exerciser
— I/O port/DWLMA loopback exerciser
— Disk/tape device exerciser
— Network exerciser
— FBE exerciser
— XCT (XMI bus exerciser) exerciser
• Manual tests
• Load
• File
• Raw disk
• Tape
• Memory
• Network
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