SCF Reference Manual for the Storage Subsystem (G06.28+, H06.05+, J06.03+)

enclosure
interleaving
On HP NonStop S-series systems, configuring a mirrored disk volume to use two separate system
enclosures. For internal disk drives, the two disk drives of the mirrored volume can be in separate
enclosures. For 45xx disk drives, the adapters connected to the two disk drives of the mirrored
volume can be in separate enclosures.
Enterprise Storage
System (ESS)
A collection of disks, their controllers, and the disk cache in a standalone cabinet or cabinets.
These disks are configured by an attached console and presented to the attached server as logical
volumes that can be a fraction of a physical volume or can span volumes.
error number For the Subsystem Programmatic Interface (SPI), a value that can be assigned to a return token,
or to the last field of an error token, to identify an error that occurred. SPI defines a small set of
error numbers, but most error numbers are defined by subsystems.
ESS disk A disk drive within an Enterprise Storage System (ESS).
Event Management
Service (EMS)
A Distributed Systems Management (DSM) product that provides event collection, event logging,
and event distribution facilities. EMS provides different event descriptions for interactive and
programmatic interfaces, lets an operator or an application select specific event-message data,
and allows for flexible distribution of event messages within a system or network.
event message Text intended for a system operator that describes a change in some condition in the system or
network, whether minor or serious. The change of condition is called an event. Events can be
operational errors, notifications of limits exceeded, requests for actions needed, and so on. See
also operator message.
extent A contiguous area on disk for allocating one file.
fabric A complex set of interconnections through which there can be multiple and (to the user) unknown
paths from point to point. The term fabric is used to refer to the X or Y portion of the internal or
external network; for example, the X fabric.
fault tolerance The ability of a HP NonStop S-series system to continue processing despite the failure of any
single software or hardware component within the system.
FC switch See Fibre Channel switch (FC switch).
Fibre Channel
ServerNet adapter
(FCSA)
A ServerNet adapter that transmits data between an HP NonStop™ server and Fibre Channel
storage devices. This ServerNet adapter is installed in an IOAM enclosure.
Fibre Channel
switch (FC switch)
Networking hardware that can connect an Enterprise Storage System and a NonStop server.
This switch allows any-to-any connectivity.
file name A unique name for a file. File names for disk files normally have at least two parts (the disk name
and the file name); an example of a file name on a PC is B:MYFILE. In the Guardian environment
on HP NonStop S-series systems, disk file names include a disk volume name, a subvolume name,
and a file identifier. An example of a file name on a NonStop S-series system is
$DISK.SUBVOL.MYFILE. For files that are network accessible, the node name precedes the volume
name: \NODE.$DISK.SUBVOL.MYFILE.
generic process A process created and managed by the Kernel subsystem. Also known as a system-managed
process. A common characteristic of a generic process is persistence.
gigabyte (GB) A unit of measurement equal to 1,073,741,824 bytes (1024 megabytes). See also kilobyte (KB),
megabyte (MB), and terabyte (TB).
Global NonStop
Support Center
(GNSC)
A support organization that provides telephone and remote diagnostic support for HP customers.
There are GNSCs located all over the world.
group The set of all objects accessible by a pair of service processors (SPs) located in the processor
multifunction (PMF) customer-replaceable unit (CRU). In an HP NonStop S-series server, there is
exactly one group in a system enclosure.
Guardian An environment available for interactive or programmatic use with the HP NonStop operating
system. Processes that run in the Guardian environment usually use the Guardian system procedure
calls as their application program interface; interactive users of the Guardian environment usually
use the HP Tandem Advanced Command Language (TACL) or another HP product’s command
interpreter.
366 Glossary