NonStop NS-Series Operations Guide (H06.03+)

Creating Startup and Shutdown Files
HP Integrity NonStop NS-Series Operations Guide—529869-001
16-4
Processes That Represent the System Console
Processes That Represent the System
Console
On Integrity NonStop NS-series servers, the system console is a pair of windows on a
LAN-connected system console. It is represented by the processes $YMIOP.#CLCI
and $YMIOP.#CNSL, and the home terminal is represented by the $ZHOME process
pair.
$YMIOP.#CLCI
$YMIOP.#CLCI is the primary interactive terminal for the operator interface to the
system.
This process:
•
Runs on the system console
•
Is preconfigured on your system during system generation
TACL processes are started on $YMIOP.#CLCI by commands in the CIIN file. If a read
operation is pending, such as a TACL prompt on $YMIOP.#CLCI, write operations are
blocked, causing the process attempting the write operation to wait indefinitely.
$YMIOP.#CNSL
$YMIOP.#CNSL is a write-only device for logging.
This process:
•
Runs on the system console
•
Is preconfigured on your system during system generation
$ZHOME
The $ZHOME process is a process pair that provides a reliable home terminal to which
processes can perform write operations. The $ZHOME process can be used by
processes that must write to the system console but do not require a response.
$ZHOME is preconfigured on your system by the CONFBASE file. $ZHOME is a
generic process that is part of the SCF Kernel subsystem. Note the following about the
configuration of $ZHOME:
•
The $ZHOME process is configured with $YMIOP.#CLCI as its HOMETERM,
INFILE, and OUTFILE.
•
Because $ZHOME acts as a reliable home terminal designed to interact with the
system console, $YMIOP.#CLCI, HP recommends that you do not change its
configuration. Most important:
°
Do not specify $ZHOME for the INFILE, OUTFILE, or HOMETERM for the
$ZHOME process.