Terminology
In
this
and
other
IBM
N
series
documents,
the
term
filer
or
storage
system
describes
IBM
N
series
models
that
either
contain
internal
disk
storage
or
attach
to
the
disk
storage
expansion
units
specifically
designed
for
the
IBM
N
series
storage
systems.
Note:
In
previous
releases,
the
EXN2000
expansion
unit
was
referred
to
as
the
EXP600
expansion
unit.
This
guide
uses
the
following
terms:
v
AT-FCX
refers
to
the
controller
module
of
the
serial
advanced
technology
attachment
(SATA)
storage
expansion
unit
(EXN1000).
v
Active-Active
configuration
(sometimes
referred
to
as
clustered
configuration
)
refers
to
a
High
Availability
system
with
at
least
two
nodes
that
share
resources
to
provide
redundancy.
v
CPU
module
refers
to
the
system
controller
module
that
executes
the
software
on
an
N3700.
The
CPU
modules
are
at
the
rear-center
of
the
N3700
storage
system.
v
Device
carrier
refers
to
the
container
that
encases
a
fan/power
supply
unit
or
a
disk.
v
Disk
applies
to
any
hard
disk
drive.
v
Disk
shelf
or
expansion
unit
refers
to
any
shelf
or
expansion
unit
containing
hard
disk
drives.
v
ESH2
refers
to
the
controller
module
of
the
fibre-channel
disk
storage
expansion
unit
(EXN2000).
v
Loop
refers
to
the
daisy-chained
disk
shelves
(expansion
units)
connected
to
an
N3700
storage
system.
v
Node
refers
to
a
CPU
module
when
used
in
an
active-active
(clustered)
configuration.
v
System
and
storage
system
refer
to
the
N3700
storage
system
(filer),
either
by
itself
or
with
additional
disk
shelves.
v
SES
refers
to
SCSI
enclosure
services.
Command
conventions
You
can
enter
commands
on
the
system
console
or
from
any
client
that
can
obtain
access
to
the
storage
system
using
a
Telnet
session.
In
examples
that
illustrate
commands
executed
on
a
UNIX
®
workstation,
the
command
syntax
and
output
might
differ,
depending
on
your
version
of
UNIX.
Formatting
conventions
The
following
table
lists
different
character
formats
used
in
this
guide
to
set
off
special
information.
xxii
IBM
System
Storage
N
series:
N3700
Hardware
and
Service
Guide
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