HP NetServer AA 6200 Solution Release 3.0 Administrator's Guide

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Glossary
MIC status lights. The lights on the MIC
handles that indicate whether various MIC
communications are functioning properly.
minimum downtime upgrade. A hardware
or software upgrade that requires the server to be
shut down (typically for a few minutes) and
rebooted.
mirror set. The pair of physical SCSI disks (one
on each IOP) that function as one logical disk. The
disks in a mirror set process and maintain identical
information. If a fault occurs on one of the
physical disks in a mirror set and the disk cannot
be accessed, the server automatically uses the
remaining disk in the mirror set to provide
continuous access without losing data or network
connectivity.
mirrored disk. A physical SCSI disk that
resides on the IOP and stores data for the server.
See also mirror set.
mirroring. A process for creating and
maintaining a set of identical disk images on
separate physical SCSI disks. See also mirror set.
non-identical disks. SCSI disks configured as
a mirror set that share SCSI variety
characteristics, such as both being wide or both
being narrow, but may be different sizes, and may
also have different model numbers, or be from
different manufacturers. See also mirror set.
non-mirrored device. A device in a
configuration that does not have a redundant
counterpart, such as a tape drive, a floppy disk, or
a CD-ROM. If a non-mirrored device is failed out
of a configuration, it has no counterpart to provide
continuous device access. A non-mirrored device
cannot be failed over automatically.
offline. A component state that indicates the
component cannot communicate with the rest of
the server configuration. For component specific
information on this state, refer to Chapter 2.
online. A component state that indicates the
component can communicate with the rest of the
server configuration. Some components transition
from this state to active. For component specific
information on this state, refer to Chapter 2.
pointer. An industry-standard term for devices
such as a mouse, trackball, or touchpad.
POST. Power-On Self Test. A test that each
system passes as part of its initial boot process.
The content of POST is specific to the system’s
manufacturer and model.
provider. IOP-based software driver that
provides access to a specific service. For example,
a SCSI provider provides access to SCSI devices,
and an Ethernet provider provides access to
Ethernet devices. Providers receive and process
requests from the CEs. See also redirector.