Table of Contents
Advertisement
Glossary
Glossary
Fibre (Also known as "fibre channel.") . A device (in the case of RAID, a data storage device)
protocol capable of high data transfer rates. Fibre channel simplifies data bus sharing and supports
not only greater speed, but also more devices on the same bus. Fibre channel can be used over both
copper wire and optical cable.
Fiber . An optical network data transmission cable type which is unrelated to fibre channel (above).
HBA
Host-Bus Adapter . an HBA is a device that permits a PC bus to pass data to and receive data
from a storage bus (such as SCSI or fibre channel).
Host . A computer, typically a server, which uses a RAID system (internal or external) for data
storage.
Host LUN (See Host and LUN). "Host LUN" is another term for a LUN.
In-Band SCSI (sometimes "in-band" or "In-band") . A means whereby RAID management software
can use SCSI protocols to manage a controller. (Note: in-band SCSI is typically used in place of RS-
232 for controller management.)
JBOD . Just a Bunch of Drives – non-RAID use of multiple hard disks for data storage.
JRE
Java Runtime Environment – . the Solaris Java program used to run.JAR applications locally
or over a network or the internet.
Logical Drive . Typically, a group of hard disks logically combined to form a single large storage
unit. More broadly, the assignment of a SCSI or Fibre channel ID to a drive or drives for use in
storage management. Often abbreviated, "LD."
Logical Volume . A group of logical drives logically combined to form a single large storage unit.
Often abbreviated, "LV."
LUN (Logical Unit Number) . A 3-bit identifier used on a SCSI bus to distinguish between up to eight
devices (logical units) with the same SCSI ID.
Mapping . The assignment of a protocol or logical ID to a device for purposes of data storage, data
transfer, or device management.
Mirroring . A form of RAID where two or more identical copies of data are kept on separate disks.
Used in RAID 1.
NAS
Network Attached Storage . a RAID enclosure that includes a network interface so that the
disk array can be directly connected to a LAN.
NPC. Notification Processing Center. a software application included with Altos RAIDWatch which
permits event notification via various methods including e-mail and fax.
NRAID . Non RAID
189
Advertisement
Table of Contents
