storage
area
network
(SAN)
A
network
whose
primary
purpose
is
the
transfer
of
data
between
computer
systems
and
storage
elements
and
among
storage
elements.
A
SAN
consists
of
a
communication
infrastructure,
which
provides
physical
connections,
and
a
management
layer,
which
organizes
the
connections,
storage
elements,
and
computer
systems
so
that
data
transfer
is
secure
and
robust.
(S)
Storage
Management
Initiative
Specification
(SMI-S)
A
design
specification
developed
by
the
Storage
Networking
Industry
Association
(SNIA)
that
specifies
a
secure
and
reliable
interface
that
allows
storage
management
systems
to
identify,
classify,
monitor,
and
control
physical
and
logical
resources
in
a
storage
area
network.
The
interface
is
intended
as
a
solution
that
integrates
the
various
devices
to
be
managed
in
a
storage
area
network
(SAN)
and
the
tools
used
to
manage
them.
Storage
Networking
Industry
Association
(SNIA)
An
association
of
producers
and
consumers
of
storage
networking
products
whose
goal
is
to
further
storage
networking
technology
and
applications.
See
www.snia.org.
striped
Pertains
to
a
virtual
disk
(VDisk)
that
is
created
from
multiple
managed
disks
(MDisks)
that
are
in
the
MDisk
group.
Extents
are
allocated
on
the
MDisks
in
the
order
specified.
stripeset
See
RAID
0
.
subsystem
device
driver
(SDD)
An
IBM
pseudo
device
driver
designed
to
support
the
multipath
configuration
environments
in
IBM
products.
superuser
authority
The
level
of
access
required
to
add
users.
suspended
The
status
of
a
pair
of
virtual
disks
(VDisks)
that
have
a
copy
relationship
that
has
been
temporarily
broken
because
of
a
problem.
switch
A
network
infrastructure
component
to
which
multiple
nodes
attach.
Unlike
hubs,
switches
typically
have
internal
bandwidth
that
is
a
multiple
of
link
bandwidth,
and
the
ability
to
rapidly
switch
node
connections
from
one
to
another.
A
typical
switch
can
accommodate
several
simultaneous
full
link
bandwidth
transmissions
between
different
pairs
of
nodes.
(S)
Contrast
with
hub
.
symmetrical
network
A
network
in
which
all
the
initiators
are
connected
at
the
same
level
and
all
the
controllers
are
connected
at
the
same
level.
symmetric
virtualization
A
virtualization
technique
in
which
the
physical
storage
in
the
form
of
Redundant
Array
of
Independent
Disks
(RAID)
is
split
into
smaller
chunks
of
storage
known
as
extents
.
These
extents
are
then
concatenated,
using
various
policies,
to
make
virtual
disks
(VDisks).
See
also
asymmetric
virtualization
.
Glossary
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