C-2 Glossary of Terms and Abbreviations
SCSI hardware, and the operating system level drivers that support
these architectures. Fusion-MPT architecture offers a single binary,
operating system driver that supports both Fibre Channel and SCSI
devices.
host The computer system in which a storage controller is installed. It uses
the storage controller to transfer information to and from devices
attached to the SCSI bus.
host controller
board
A circuit board or integrated circuit that provides a device connection to
the computer system.
hot spare An idle, powered on, standby drive ready for immediate use in case of
disk failure. It does not contain any user data. A hot spare can be
dedicated to a single redundant array or it can be part of the global
hot-spare pool for all arrays managed by the controller.
When a disk fails, the controller firmware automatically replaces and
rebuilds the data from the failed drive to the hot spare. Data can be
rebuilt only from virtual disks with redundancy (RAID levels 1, 5, 6, 10,
50, and 60; not RAID level 0), and the hot spare must have sufficient
capacity.
internal SAS
device
A SAS device installed inside the computer cabinet. These devices are
connected by using a shielded cable.
main memory The part of a computer’s memory which is directly accessible by the CPU
(usually synonymous with RAM).
NVRAM Acronym for Nonvolatile Random Access Memory. An EEPROM
(Electronically Erasable Read-Only Memory chip) that stores
configuration information. Refer to EEPROM.
PCI Acronym for Peripheral Component Interconnect. A high-performance,
local bus specification that allows the connection of devices directly to
computer memory. The PCI Local Bus allows transparent upgrades from
32-bit data path at 33 MHz to 64-bit data path at 33 MHz, and from 32-bit
data path at 66 MHz to 64-bit data path at 66 MHz.
PCI Express Acronym for Peripheral Component Interconnect Express. A
high-performance, local bus specification that allows the connection of
devices directly to computer memory. PCI Express is a two-way, serial
connection that transfers data on two pairs of point-to-point data lines.
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