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SN0054671-00 A Glossary-1
Glossary
adapter
The board that interfaces between the
host system and the target devices.
Adapter is synonymous with host bus
adapter, host channel adapter (HCA), host
adapter, and adapter board.
adapter port
A port on the adapter board.
adapter port beacon
An LED on the adapter. Flashing it enables
you to locate the adapter.
alias
A user-defined name for an adapter, adapter
port, logical disk, or subsystem.
Basic input output system (BIOS)
The program (or utility) that serves as an
interface between the hardware and the
operating system and allows booting from
the adapter at startup.
boot device
The device, usually a the hard disk, that
contains the operating system the BIOS
uses to boot from when the computer is
started.
boot from SAN
The ability for each server on a network to
boot their operating system from a Fibre
Channel RAID unit located on the SAN,
rather than from a local disk or
direct-attached storage (DAS). This
enables easier SAN management
because you can replace a server and
boot it from the Fibre Channel RAID unit.
challenge-handshake authentication
protocol (CHAP)
CHAP is used for remote logon, usually
between a client and server or a Web
browser and Web server. A
challenge/response is a security mecha-
nism for verifying the identity of a person
or process without revealing a secret
password that is shared by the two
entities. Also referred to as a” three-way
handshake.”
Converged Network Adapter
QLogic Converged Network Adapters
support both data networking (TCP/IP)
and storage networking (Fibre Channel)
traffic on a single I/O adapter using two
new technologies: Enhanced Ethernet and
Fibre Channel over Ethernet.
cyclic redundancy check (CRC)
A type of check value designed to catch
most transmission errors.