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SANsurfer FC HBA Manager User’s Guide
Management Tool for QLogic FC and FCoE Adapters
Glossary-4 SN0054651-00 F
S
HBA port beacon
A SANsurfer FC HBA Manager feature
that enables you to flash the adapter's
LED to locate the adapter in your
computer.
IOCB
I/O Control Block. A command structure in
QLogic ISP architecture.
Ioctl
Input/output (I/O) control. A system call
found on Unix/Linux systems, allowing an
application to control or communicate with
a device driver outside the usual read/write
operations.
IP
Internet Protocol. A method by which data
is sent from one computer to another over
the Internet. IP specifies the format of
packets, also called datagrams, and the
addressing scheme.
iSCSI
Internet Small Computer Systems Inter-
face.
ISP
Intelligent Storage Peripheral. QLogic
trademark and family of Fibre Channel and
iSCSI controller chips that replace network
interface chips in network adapters,
servers, and storage.
JBOD
Just a Bunch Of Disks.
JNLP
Java Network Launching Protocol. The
protocol, defined in an XML file format,
that specifies how Java Web Start applica-
tions are launched.
LIP
Loop Initialization Process. The initializa-
tion process in an arbitrated loop that
occurs when the loop is powered up or a
new device is added. One function of a LIP
is to assign addresses. All data transmis-
sion on the loop is suspended during a LIP.
Load balancing
A software feature that improves system
performance by balancing device access
between multiple HBAs for maximum
resource efficiency. This feature is avail-
able in Windows 2000/Windows Server
2003/Windows Vista, Novell NetWare, and
Red Hat/SUSE Linux. (Windows XP and
Windows Server 2008 do not support load
balancing.)
Loopback
A diagnostic tool where data is transmitted
and received by the HBA.
LUN
Logical Unit
Number. The small integer
handle that identifies a portion of disk
storage. A LUN can consist of a single
physical disk or many physical disks. A
physical disk can be broken into multiple
LUNs.
LUN masking
A software feature that assigns LUNs to
specific servers or hides LUNs from
specific servers for maximum access and
availability control.
Media
Electronic carriers of information. FC
supports several different physical media:
copper, multimode optical, and
single-mode optical, which differ mainly in
the maximum cable length. All FC proto-
cols are supported on all media.