Glossary - Sun Microsystems StorEdge S1 Array Manual

1 rack unit (1 U)
AC
ATM
Carrier grade
Cluster
Commodity server
Density
Differential SCSI
Ethernet 10/100BASE−T
EMI
ESD
ETSI
FC−AL
field replaceable units
(FRUs)
Hot−swappable
Infrastructure services
I/O
ISP
JBOD
LVD SCSI
Sun StorEdge S1 Array
Just the Facts

Glossary

One rack unit as defined by the Electronic Industries Alliances (EIA). A vertical
measurement equal to 1.75 inches.
Alternating current.
Asynchronous transfer mode. ATM is a network technology that supports realtime
voice, video, and data. ATM is used as a backbone technology by major enterprises
and ISPs.
Rackmountable systems with features including remote alarm capabilities, front−
back cooling, front accessibility of media, rear cabling, and rugged NEBS−
compliant packaging.
Multiple server/storage configuration using software that enables failover
protection should any drive fail.
A server that is replaced when it fails, instead of being repaired.
Number of units in a given amount of space.
A type of SCSI signaling used when devices are spread across a room. Total cable
length is approximately 80 feet (24.4 m). Differential devices cost more than
single−ended devices.
The most widely used LAN access method defined by the IEEE 802.3 standard;
uses standard RJ−45 connectors and telephone wire. 100BASET is also referred to
as Fast Ethernet.
Electromagnetic interference
Electrostatic discharge
European Telecommunications Standards Institute; a non−profit membership
organization dedicated to standardizing telecommunications throughout Europe.
Fibre channel arbitrated loop. A topology for Fibre Channel in which all devices
are linked together in a loop.
A feature that allow one unit to be exchanged with another to minimize mean time
to repair
A feature that allows an administrator to remove a drive without affecting software
integrity.
Services that an SP runs to provide revenue services to clients. Examples include:
firewalls, DNS, log processing, authentication, mail−relay, distributed SNMP, and
low−end cache server.
Input/output. Transferring data between the CPU and any peripherals.
Internet service provider.
Just a bunch of disks; a group of hard disks that are not set up in a RAID
configuration.
Low voltage differential; a type of SCSI signaling that supports cable lengths of up
to 39.4 feet (12 m). LVD SCSI uses data low and data high lines to increase
transmissions distance. LVD is less costly than differential because transceivers are
built into the controller chips. LVD also requires less power. Sun does not support
LVD in servers or host adapters. Sun StorEdge S1 array is compatible with third−
party LVD host adapters, although Sun does not formally support it.
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