Glossary
Nexsan E60™/Nexsan E48™
FRU Removal and Replacement Guide
Nexsan
www.nexsan.com
32
Glossary
1
10Gb Ethernet
A 10 gigabit per second (Gb/s) Ethernet
connection using either fiber-optic cables or
twisted-pair copper wires.
10Gb iSCSI
An iSCSI connection that runs on a 10Gb
Ethernet network.
10GbE
See 10Gb Ethernet and 10Gb iSCSI.
A
active drawer
A slide-out container on the front of Nexsan E-
Series storage units that houses the disk drives
used by the unit for data storage. Also
sometimes referred to as a “pod” in event logs
and other internal statistics.
Active Drawer Technology
Nexsan’s industry-first technology which
enables users to replace drives and perform
certain maintenance tasks without powering off
the system and without interrupting service. An
advanced, built-in cable management system
allows cables to extend and retract with the
active drawer for easy servicing.
Anti-Vibration Design
Nexsan’s proprietary disk installation scheme
wherein drives are loaded into the chassis in
opposite-facing pairs. Disks in each pair rotate in
opposite directions and serve to self-dampen any
related vibration.
antistatic wrist strap
An anti-static device used to prevent
electrostatic discharge (ESD) by safely
grounding a person working on electronic
equipment. Also called an ESD strap or a
grounding bracelet.
array
A linked group of one or more physical,
independent hard disk drives. See also RAID.
B
bit
The smallest unit of digital data, representing a 0
or a 1. Abbreviated “b”.
byte
A unit of data that is 8 bits long. Often used for
alphanumeric characters. Abbreviated “B”.
C
cache
Reserved areas of memory that are used to
speed up instruction execution, data retrieval,
and data updating. In Nexsan storage units, a
memory unit in the RAID controller that
temporarily holds user data.
CoolDrive Technology
Nexsan’s proprietary active drawer cooling
system, which uses front- and rear-mounted fans
to provide air intake and exhaust through the
drawer. Air flows from the front of the drawer to
the back through airflow channels located
between the drive pairs. Either fan can fail; air is
still supplied to the drawer by the alternate fan.
D
daisy-chain
The attachment of hardware to a computing
system by connecting each component to
another similar component rather than directly to
the computing system that uses the component.
Only the last component in the chain directly
connects to the computing system. For example,
up to two Nexsan E-Series expansion units can
be daisy-chained to the back of one Nexsan E-
Series main storage unit.
drawer front assembly
In Nexsan E60 and E48 storage units (and their
V, VT and P variants), the assembly that houses