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C120-E093-04EN
Glossary
FC-AL
Fiber Channel-Arbitrated Loop. A loop type full
duplex serial interface that uses copper wire or optical
fiber, complying with the Fiber Channel standard
(X3T11) established by ANSI. Use two readable/
writable lines. One line can transfer at 100 Mbps, and
200 Mbps is achieved in 2-line transfer. In network
use, Fibre Channel interface establishes star
connection generally involving HUB and switches.
However, in mainstream of storage use, it establishes
loop connection based on FC-AL.
HA (High Availability)
High Availability feature ensures the continuation of
system operation in the event of a hardware failure
and enables to replace failed components without
interrupting operation.
Hot swapping
Replaces faulty unit of maintenance object in the
system with non-defective unit while system is
operated (OS is running).
Interleave
A control method main storage unit that improves
effective speed of main storage access. By splitting
main storage into several parts (Way), independent
access to alternative section is enabled.
Law concerning Rational Use of
Energy
Regulation to promote effective use of energy, and
exclusion of wasting. Established in 1979. Up to
date, it's in force about 20 years.
MAC address
MAC (Media Access Control). A hardware address
that is uniquely assigned to NIC (Network Interface
Card), or each port of network interface devices,
switches, or routers on the motherboard.
NTP
Network Time Protocol. A time information protocol
that is commonly applied in the Internet Accurate
time information is offered, taking in line transfer rate
and load variation on the route.
PCI
Peripheral Component Interface. One of IEEE
standard interfaces.
RAID
Redundant Arrays of Inexpensive Disks.
Configures highly reliable external storage unit by
implementing redundant mechanism, and by
deploying multiple internal hard disk units (HDD) in
parallel that achieves high-speed read/write.
Depending on disk configuration and data check
methods, it is classified into six levels as RAID-0 to
RAID-5.
RCI
Remote Cabinet Interface. A power/system control
interface that is used to connect every units such as
processing units and Expansion File Units, and to
process power interlocking, alarm notification /
recognition, and various processing.
Redundant configuration
The provision of duplex or multiple interchangeable
components to perform a single function in order to
cope with failures and errors.
RS-232C
A standard interface that is used to connect between
computers, or computers and peripheral devices for
data exchange. This interface is approved by
Electronic Industries Association (EIA), and is
adopted in most of PCs as general input/output serial
interface. Use for connection among PC and printer,
plotter, and mouse.
SCSI
Small Computer System Interface. A parallel I/O bus
standardized in 1986 by ANSI as ANSI X3.131-1986.
This deploys eight bits width transfer and supports
daisy chain among up to eight devices. Data transfer
rate is 5 Mbps.
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