Users Guide

Glossary 103
updating the documentation for the software or
hardware. Typically, readme files provide installation
information, describe new product enhancements or
corrections that have not yet been documented, and
list known problems or other things you need to be
aware of as you use the software or hardware.
ROM
Acronym for read-only memory. Your system contains
some programs essential to its operation in ROM code.
Unlike RAM, a ROM chip retains its contents even
after you turn off your system. Examples of code in
ROM include the program that initiates your system's
boot routine and the POST.
RPM
Abbreviation for Red Hat Package Manager.
schema
A collection of class definitions that describes managed
objects in a particular environment. A CIM schema is
a collection of class definitions used to represent
managed objects that are common to every
management environment, which is why CIM is called
the Common Information Model.
SCSI
Acronym for small computer system interface. An I/O
bus interface with faster data transmission rates than
standard ports. You can connect up to seven devices
(15 for some newer SCSI types) to one SCSI interface.
server module
A modular system component that functions as an
individual system. To function as a system, a server
module is inserted into a chassis which includes power
supplies, fans, a system management module, and at
least one network switch module. The power supplies,
fans, system management module, and network switch
module are shared resources of the server modules in
the chassis. See modular system.
service tag number
A bar code label that identifies each system in the event
that you need to call for customer or technical support.
SMART
Acronym for Self-Monitoring Analysis and Reporting
Technology. A technology that allows hard drives to
report errors and failures to the system BIOS, which
then displays an error message on the screen. To take
advantage of this technology, you must have a
SMART-compliant hard drive and the proper support
in the system BIOS.
SMBIOS
Acronym for system management BIOS.
SNMP
Abbreviation for Simple Network Management
Protocol. SNMP, a popular network control and
monitoring protocol, is part of the original TCP/IP
protocol suite. SNMP provides the format in which
vital information about different network devices, such
as network servers or routers, can be sent to a
management application.
SNMP trap
A notification (event) generated by the RAC or
ESM that contains information about state changes on
the managed system or about potential
hardware problems.
SOL
Abbreviation for Serial Over LAN. SOL enables
suitably designed servers to transparently redirect the
serial character stream of a baseboard UART to/from a
remote client over a shared LAN. The architecture
requires software running on the managed system’s
BMC and client software running on a management
station and/or a central network proxy.
SPCR
Abbreviation for Serial Port Console Redirection
table. This table provides information about how the
system firmware and service processor use the out-of-
band (OOB) management port. The SPCR table is
read by the Special Administrative Console (SAC) for
console redirection and configures itself automatically
during a bootable CD installation.