Hitachi G1500 - Page 180

host bus adapter (HBA)
One or mor
e dedicated adapter car
ds that ar
e installed in a host, have unique WWN
addr
esses, and provide Fibre Channel I/O connectivity to storage systems, typically through
Fibre Channel switches. Unlike general-purpose Ethernet adapters, which handle a multitude
of network protocols, host bus adapters are dedicated to high-speed block transfers for
optimized I/O performance.
host I/O module
I/O module for the controller box . The host I/O module provides interface functions for the
host.
I/O
input/output
I/O card
The I/O card (ENC) is installed in a DBX. It provides interface functions for the controller box or
drive box.
I/O module
The I/O module (ENC) is installed in a DBS/DBSD/DBL/DBLD/DBF/DBW. It provides interface
functions for the controller box or drive box.
IEEE
Institute of Electrical and Electronics Engineers. A non-prot professional association best
known for developing standards for the computer and electronics industry. In particular, the
IEEE 802 standards for local-area networks are widely followed.
IOPS
I/Os per second
iSCSI
Internet Small Computer Systems Interface
iSCSI initiator
iSCSI-specic software installed on the host server that controls communications between the
host server and the storage system.
iSNS
Internet Storage Naming Service. An automated discovery, management, and conguration
tool used by some iSCSI devices. iSNS eliminates the need to manually congure each
individual storage system with a specic list of initiators and target IP addresses. Instead, iSNS
automatically discovers, manages, and congures all iSCSI devices in your environment.
LAN
See local area network.
load
In UNIX computing, the system load is a measure of the amount of work that a computer
system is doing.
Glossary
Hitachi Virtual Storage Platform G1000, G1500, and VSP F1500 Hardware Guide 180