Tri-star, Unattended site, Tri-star topology – HP NonStop G-Series User Manual
Page 279
ServerNet Cluster view. The System view bears the name of the local system and
displays resources within the system. The ServerNet Cluster view displays resources in a
supported Expand network, such as a ServerNet cluster.
See also
and
tri-star topology
that uses up to three HP NonStop Cluster Switches for each external
fabric. External routing is implemented between the three star groups of a ServerNet
cluster. (A star group consists of the eight nodes attached to one set of cluster switches.)
The star groups are joined by two-lane links. The tri-star topology supports up to 24
nodes. See also
,
two-lane link
The two single-mode fiber-optic (SMF) ServerNet cables that connect the HP NonStop
Cluster Switches on the same external fabric (for example, X1, X2, and X3) in a
U
unattended site (dark site)
A location where no operator is working on site and the only access to the
centralized monitoring station through a modem connected to a routing
. Dark
site is a synonym for unattended site.
uncorrectable memory error (UCME)
An error caused by incorrect data at a particular memory location. The cause of the
incorrect data is one that is not automatically corrected by the system, and memory
replacement might be required. The occurrence of a UCME indicates that a processor is
having memory errors. The processor halts with a hardware error freeze and generates an
uninterruptible power supply (UPS)
The equipment used to provide an uninterruptible source of power to connected
equipment if a main power outage occurs. The basic components of any UPS system are
a rectifier/charger that converts alternating-current (AC) power to direct-current (DC)
power, batteries that store the DC power, and an inverter that converts the DC power
back into AC power for distribution to the load..
V
value-added diagnostics
A collection of troubleshooting and support features that are included with a valid service