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6760 ServerNet/DA Manual

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Glossary
6760 ServerNet/DA Manual—424879-003
Glossary-103
X fabric
X fabric. The X side of the internal or external ServerNet fabrics. See also fabric, external
ServerNet X or Y fabric, and internal ServerNet X or Y fabric.
XIO. See extensible input/output (XIO).
XLLINK. The linker program invoked during system generation to link accelerated (file code
100) TNS object files to create system code and system library files.
XO bond. The bond connection on an isolation transformer, installed between the
transformer’s neutral XO terminal and ground. This bond is required at North American
and British sites to provide an effective return path for any equipment conductor fault
current back to the neutral of the isolation transformer.
Y fabric. The Y side of the internal or external ServerNet fabrics. See also fabric, external
ServerNet X or Y fabric, and internal ServerNet X or Y fabric.
$YMIOP. The name of the maintenance I/O process that is built during system generation
and is available at system startup.
$ZCNF. The name of the configuration utility process.
zero-signal reference. A connecting point, bus, or conductor used as one side of a signal
circuit. Such a reference object might or might not necessarily be designated as a
ground. Sometimes referred to as a common circuit.
$ZEXP. The name of the Expand manager process.
$ZMnn. The name of the QIO monitor process in processor nn.
$ZNET. The name of the Subsystem Control Point (SCP) management process.
zombie process. In the Open System Services (OSS) environment, a process that has
terminated but is still recorded in system tables.
$ZPM. The name of the persistence manager process.
ZSCL. The subsystem identifier for the ServerNet cluster subsystem.
ZSERVER. The object file name of the $ZSVR server process for the labeled-tape
subsystem.
ZSMN. The subsystem identifier for the external system area network manager process
(SANMAN).
$ZSVR. The name of the server process for the labeled-tape subsystem. See also
ZSERVER
.
ZSYSCONF subvolume. The subvolume on the $SYSTEM disk that contains the system
configuration database.