Glossary
QX and QXS Setup Guide 208
map/mapping Settings that specify whether a volume is presented as a storage device to a host, and how
the host can access the volume. Mapping settings include an access type (read-write, read-
only, or no access), controller host ports through which initiators may access the volume, and
a LUN that identifies the volume to the host.
MC Management Controller. A processor located in a controller module that is responsible for
human-computer interfaces and computer-computer interfaces, including the WBI, CLI, and
FTP interfaces, and interacts with the SC. See also EC and SC.
metadata Data in the first sectors of a drive that stores all drive-, vdisk-, and volume-specific information
including vdisk membership or spare ID, vdisk ownership, volumes in the vdisk, host mapping
of volumes, and results of the last media scrub.
MMF Multimode fiber.
mount To enable access to a volume from a host OS.
multimode fiber See MMF.
network port An Ethernet port on a controller module through which its MC is connected to the network.
point-to-point The FC topology where two ports are directly connected.
POST Power-On Self Test. Tests that run immediately after a device is powered on.
Power-on Self
Test
See POST.
Power Supply
Unit
See PSU.
PSU Power Supply Unit. The power supply FRU.
RAID chassis A drive enclosure known as a RAID chassis that contains two controller modules.
recovery In an active-active configuration, recovery is the act of returning ownership of controller
resources to a controller (which was offline) from its partner controller. The resources include
volumes, cache data, host ID information, and LUNs and WWNs.
SC Storage Controller. A processor located in a controller module that is responsible for RAID
controller functions. The SC is also referred to as the RAID controller. See also EC and MC.
SCSI
Enclosure
Services
See SES.
secure shell See SSH.
SES SCSI Enclosure Services. The protocol that allows the initiator to communicate with the
chassis using SCSI commands.
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