HP NonStop G-Series User Manual
Page 286
logic board (LB)
A printed wiring assembly (PWA) on which computer circuits (chips and wiring) are mounted.
One type of logic board is a
processor and memory board (PMB)
. Another type is a
multifunction
I/O board (MFIOB)
.
logical device
number
A number that identifies a particular I/O device in the system. Logical device numbers are
assigned to physical I/O devices.
logical interface
(LIF)
A process that allows an application or another process to communicate with data
communications hardware.
logical name
An
attribute
of a resource that is either assigned to the I/O process associated with the resource
during configuration using the
Subsystem Control Facility (SCF)
or that represents the type of
resource or its location.
When you are logged on to the OSM Service Connection, you can use the logical name to
locate a resource.
Examples:
•
$DATA04-P is the logical name of the disk CRU located in group 1, module 1, slot 13.
•
SCSI-3.GRP-1.MOD-1.SLOT-50 is the logical name of the third SCSI bus on the IOMF2
CRU located in group 1, module 1, slot 50.
•
Switch_Y_Guid_VOPXKH is the logical name for a NonStop Cluster Switch on the external
Y fabric of a ServerNet cluster.
See also
SP logical name
.
logical processor
The combination of equivalent processor elements in the Blade Elements that are running in
the same instruction stream in loose lock-step.
Logical Unit
Number (LUN)
A SCSI convention used to identify elements. The host sees a virtual disk as a LUN. The LUN
address a user assigns to a virtual disk for a particular host will be the LUN at which that host
will see the virtual disk.
low-level link (LLL)
A connection between the OSM client software running on a workstation and the
master service
processors (MSPs)
on the
server
. When the operating system is not running, communication
must take place over a
low-level link
. You can also communicate with a server over a low-level
link when the operating system is running. Certain tasks can be performed only using a low-level
link.
See also
service connection
.
M
maintenance
entity
A processing entity in a single HP NonStop™ system that collects state information,
environmental information, and failure data about the system resource or resources for which
the maintenance entity is responsible. A maintenance entity can include both physical and
software components, and a system can contain multiple maintenance entities. For example,
each I/O adapter module (IOAM) and processor switch has its own maintenance entity.
maintenance
switch
The Ethernet switch that links the maintenance entities in various modular components to the
OSM interface.
Management
window
The Management window provides an easy way to browse through a complex system installation.
It contains four panes.
The left pane is the tree pane. It displays a hierarchical tree structure containing server or cluster
resources that you can select.
The lower-right pane is the overview pane. It displays only the high-level system objects (such
as internal fabrics and groups). When you click the Cluster tab, the overview pane displays only
the high-level cluster objects (external fabrics, local node, and remote nodes). The overview
pane does not appear in the OSM Low-Level Link.
The top pane is the view pane. It might contain a
Physical view
or an
Inventory view
. You can
select the type of view from the Display menu or the toolbar.
The lower pane is the details pane. It displays the specific information about the selected
resource. Click a tab to select the type of information to display in the details pane.
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Glossary