Clustering
Disk-to-Disk Backup
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Compatible
FireWire
Hot
Swap Benefit
RAID
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Comparison
Repeater
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Termination
Basics
Interface
& Connector
Reference
SCSI
Connectors
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Storage Dictionary
- IDE
(also see EIDE)
- Integrated
Drive Electronics.
- Idle
- A fill
word transmitted on a fiber to fill the space between frames.
In Fibre Channel, a fiber must have continuous transmission
words sent and received at regular intervals for it to remain
operational. inbound fiber
- initialization
- To
start the process by which a device or system is prepared
or prepares itself for normal operation. Usually all parameters
are returned to their default values.
- initiator
- SCSI
device (usually a host system) that requests an operation
to be performed by another SCSI device, the target.
- I/O
- Input/Output
- inbound
fiber
- One
fiber in a link that carries information into a port.
- interface
- A set
of protocols used between components, such as cables, connectors,
and signal levels. Also the connection and interaction between
hardware, software and the user.
- IP
- Internet
Protocol. A set of protocols developed by the Department
of Defense to communicate between dissimilar computers across
networks.
- IPI
- Intelligent
Peripheral Interface. An ANSI standard for controlling peripheral
devices by a host computer.
- JBOD
- Just-a-Bunch-Of-Disks,
also called a disk farm.
- jukebox
- A device
that holds multiple optical disks or magnetic tapes, and
one or more disk or tape drives, and which can swap the
media in and out of the drive as needed. Same as an autochanger.
Also called medium changer, or disk or tape libraries.
- Kbyte
- Kilobyte,
or 1024 bytes. Broadly, one thousand bytes. 16 Kbytes, or
16K, is 16,384 bytes; 64K is 65,536 bytes, etc.
- L_Port
- An
arbitrated loop port: either an NL_Port, an FL_Port, or
a GL_Port.
- LAN
- Local
Area Network. High-speed transmissions over twisted pair,
coax, or fiber optic cables that connect terminals, personal
computers, mainframe computers and peripherals at distances
of about one mile or less.
- laser
- Light
Amplification by Stimulated Emission of Radiation. A device
for generating coherent radiation in the visible, ultraviolet,
or infrared portions of the electromagnetic spectrum.
- laser
disk
- A disk
storage device using laser technology for storing and retrieving
data.
- laser
printer
- Printer
that uses a beam of light to charge a drum so that it attracts
toner, which is transferred to heated paper.
- LBA
- Logical
Block Address.
- LED
- Light-Emitting
Diode
- LIFO
- Last
in First Out. A queuing scheme whereby the most recent element
to be entered is acted on first. Contrast with FIFO.
- link
- One
inbound fiber and one outbound fiber connected to a port
- load
sharing
- The
division of a load or a task among subsystem components.
- logical
- A feature
not physically present, but applied by software. Sectors
on a hard disk are physically arranged contiguously; logically,
sectors may be placed anywhere on a hard disk, requiring
a software program to arrange them in the correct order.
- logical
unit (LU)
- A physical
or virtual device addressable through a target. A physical
device can have more than one logical unit.
- low-profile
- Refers
to 1" vertical space for a device or device bay. Applies
to the 3.5" form factor only. See also full-height
and half-height.
- LSB
- Least
Significant Byte or Bit.
- LUN
- Logical
Unit Number, used to identify a logical unit.
- LVD
- Low
Voltage Differential interface.
- LVDS
- Low
Voltage Differential Signaling. A differential interface
that uses a 3.3 volt supply voltage rather than a 5 volt
one.
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