What would a XIR signal do to a server and why would it be used?

Reset/interrupt it. Used if server has hung.

sridhar_madadi
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Sep 23rd, 2005
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ajay kalyan

May 30th, 2006

XIR signal used by reset command in solaris.
reset(1M) allows you to reset one or more domains in one of two ways: reset the hardware to a clean state or send an externally initiated reset (XIR) signal. The default is to reset the hardware to a clean state. You will receive an error if the virtual keyswitch is in the secure position. An optional confirmation prompt is given by default. Refer to Chapter 6 in the System Management Services (SMS) 1.2 Administrator Guide for the Sun Fire 15K/12K Systems for more information.
An XIR signal (reset -x ) also traps to low-level domain software (OpenBoot PROM or kadb ), which retains control of the software. The domain must be rebooted manually.
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