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Glossary
This
glossary
provides
definitions
for
Fibre
Channel
and
switch
terminology
used
for
IBM
TotalStorage
SAN
switches
and
related
products.
It
also
provides
additional
definitions
of
technical
terms
and
abbreviations.
If
you
do
not
find
the
term
you
are
looking
for,
see
the
IBM
Terminology
located
at
http://www.ibm.com/ibm/terminology/
This
glossary
includes
terms
and
definitions
from:
v
Information
Technology
Vocabulary
by
Subcommittee
1,
Joint
Technical
Committee
1,
of
the
International
Organization
for
Standardization
and
the
International
Electrotechnical
Commission
(ISO/IEC
JTC1/SC1).
Definitions
are
identified
by
the
symbol
(I)
after
the
definition;
definitions
taken
from
draft
international
standards,
committee
drafts,
and
working
papers
by
ISO/IEC
JTC1/SC1
are
identified
by
the
symbol
(T)
after
the
definition,
indicating
that
final
agreement
has
not
yet
been
reached
among
the
participating
National
Bodies
of
SC1.
The
following
cross-reference
conventions
are
used
in
this
glossary:
See
Refers
you
to
(a)
a
term
that
is
the
expanded
form
of
an
abbreviation
or
acronym,
or
(b)
a
synonym
or
more
preferred
term.
See
also
Refers
you
to
a
related
term.
A
access
control
list
(ACL).
In
computer
security,
a
list
associated
with
an
object
that
identifies
all
the
subjects
that
can
access
the
object
and
their
access
rights.
For
example,
an
access
control
list
is
a
list
that
is
associated
with
a
file
that
identifies
the
users
who
can
access
the
file
and
that
identified
the
user’s
access
rights
to
that
file.
ACL.
See
access
control
list.
address
identifier.
A
24–bit
or
8–bit
value
used
to
identify
the
source
or
destination
of
a
frame.
alias.
An
alternate
name
for
an
element
or
group
of
elements
in
the
fabric.
Aliases
can
be
used
to
simplify
the
entry
of
port
numbers
and
worldwide
names
(WWNs)
when
creating
zones.
alias
address
identifier.
An
address
identifier
recognized
by
a
port
in
addition
to
its
standard
identifier.
An
alias
address
identifier
can
be
shared
by
multiple
ports.
alias
AL_PA.
An
arbitrated
loop
physical
address
(AL_PA)
value
recognized
by
a
loop
port
(L_port)
in
addition
to
the
AL_PA
assigned
to
the
port.
See
also
arbitrated
loop
physical
address
.
alias
server.
A
fabric
software
facility
that
supports
multicast
group
management.
AL_PA.
See
arbitrated
loop
physical
address
.
American
National
Standards
Institute
(ANSI).
The
governing
body
for
Fibre
Channel
standards
in
the
U.S.
ANSI.
See
American
National
Standards
Institute
.
API.
See
application
programming
interface
.
application
programming
interface
(API).
An
interface
that
allows
an
application
program
that
is
written
in
a
high-level
language
to
use
specific
data
or
functions
of
the
operating
system
or
another
program.
application-specific
integrated
circuit
(ASIC).
A
computer
chip
designed
for
a
particular
application.
ARB.
See
arbitrative
primitive
signal
.
arbitrative
primitive
signal
(ARB).
A
primitive
signal
that
is
transmitted
as
the
fill
word
by
a
loop
port
(L_port)
to
indicate
that
the
L_port
is
arbitrating
to
access
to
the
loop.
Applies
only
to
the
arbitrated
loop
topology.
arbitrated
loop.
A
shared
100
MBps
Fibre
Channel
transport
structured
as
a
loop
and
supporting
up
to
126
devices
and
one
fabric
attachment.
A
port
must
successfully
arbitrate
before
a
circuit
can
be
established.
arbitrated
loop
physical
address
(AL_PA).
An
8–bit
value
used
to
uniquely
identify
an
individual
port
within
a
loop.
A
loop
can
have
one
or
multiple
AL_PAs.
arbitration.
A
method
of
gaining
orderly
access
to
a
shared-loop
topology.
arbitration
wait
timeout
value
(AW_TOV).
The
minimum
time
an
arbitrating
loop
port
(L_port)
waits
for
a
response
before
beginning
loop
initialization.
area
number.
A
number
that
is
assigned
to
each
potential
port
location
in
the
switch.
Used
to
distinguish
ports
that
have
the
same
port
number
but
are
on
different
port
cards.
ASIC.
See
application-specific
integrated
circuit
.
©
Copyright
IBM
Corp.
2005
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