of
ISLs
traversed
is
the
number
of
ISL
hops
on
the
shortest
route
between
the
pair
of
nodes
that
are
farthest
apart
in
the
fabric.
J
JBOD
(just
a
bunch
of
disks)
IBM
definition:
See
non-RAID
.
HP
definition:
A
group
of
single-device
logical
units
not
configured
into
any
other
container
type.
L
LBA
See
logical
block
address
.
least
recently
used
(LRU)
An
algorithm
used
to
identify
and
make
available
the
cache
space
that
contains
the
least-recently
used
data.
line
card
See
blade
.
local
fabric
In
SAN
Volume
Controller,
those
storage
area
network
(SAN)
components
(such
as
switches
and
cables)
that
connect
the
components
(nodes,
hosts,
switches)
of
the
local
cluster
together.
local/remote
fabric
interconnect
The
storage
area
network
(SAN)
components
that
are
used
to
connect
the
local
and
remote
fabrics
together.
logical
block
address
(LBA)
The
block
number
on
a
disk.
logical
unit
(LU)
An
entity
to
which
Small
Computer
System
Interface
(SCSI)
commands
are
addressed,
such
as
a
virtual
disk
(VDisk)
or
managed
disk
(MDisk).
logical
unit
number
(LUN)
The
SCSI
identifier
of
a
logical
unit
within
a
target.
(S)
longitudinal
redundancy
check
(LRC)
A
method
of
error
checking
during
data
transfer
that
involves
checking
parity.
LRC
See
longitudinal
redundancy
check
.
LRU
See
least
recently
used
.
LU
See
logical
unit
.
LUN
See
logical
unit
number
.
LUN
masking
A
process
that
allows
or
prevents
I/O
to
the
disk
drives
through
the
host-bus-adapter
(HBA)
device
or
operating-system
device
driver.
M
managed
disk
(MDisk)
A
Small
Computer
System
Interface
(SCSI)
logical
unit
that
a
redundant
array
of
independent
disks
(RAID)
controller
provides
and
a
cluster
manages.
The
MDisk
is
not
visible
to
host
systems
on
the
storage
area
network
(SAN).
Glossary
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