Chapter
1.
Introduction
The
IBM
TotalStorage
DS4400
Fibre
Channel
Storage
Server
(referred
to
throughout
this
book
as
DS4400
Storage
Server)
is
a
high-performance
unit
that
provides
dual,
redundant
array
of
independent
disks
(RAID)
controllers
and
Fibre
Channel
interfaces
to
both
the
host
and
drive
channels.
For
the
latest
product
information,
go
to
the
following
Web
site:
http://www-1.ibm.com/servers/storage/disk/index.html
DS4400
Storage
Server
overview
The
DS4400
Storage
Server
(Machine
type
1742,
models
1RU
and
1RX)
supports
direct
attachment
of
up
to
four
hosts
containing
two
host
adapters
each,
and
is
designed
to
provide
maximum
host-side
and
drive-side
redundancy.
Using
external
Fibre
Channel
switches
in
conjunction
with
the
DS4400
Storage
Server,
you
can
attach
up
to
256
hosts
with
two
adapters
each
to
a
DS4400
Storage
Server,
using
controller
firmware
06.xx.xx.xx
or
higher.
Each
DS4400
Storage
Server
contains
several
removable
components,
called
customer
replaceable
units
(
CRUs
),
that
you
can
access
from
either
the
front
or
back
of
the
unit.
These
CRUs
include
the
battery,
RAID
controllers,
storage
server
fan,
power
supplies,
fan
and
communications
module,
minihubs,
and
Small
Form-Factor
Pluggable
(SFP)
modules.
The
DS4400
Storage
Server
also
has
a
removable
front
bezel.
The
DS4400
Storage
Server
functions
with
at
least
one
external
storage
expansion
enclosure
containing
Fibre
Channel
or
SATA
hard
drives.
The
DS4400
Storage
Server
supports
a
maximum
of
224
hard
drives
when
the
drives
are
configured
using
IBM
DS4000
EXP700,
DS4000
EXP710,
or
DS4000
EXP100
storage
expansion
enclosures.
If
the
drives
are
configured
using
IBM
FAStT
EXP500
storage
expansion
enclosures
only,
a
maximum
of
220
hard
drives
are
supported.
Attention:
v
In
order
to
attach
DS4000
EXP100
or
EXP710
storage
expansion
enclosures
to
a
DS4400
Storage
Server,
the
DS4400
Storage
Server
controller
firmware
must
be
at
version
06.xx.xx.xx
or
higher.
In
addition,
you
must
purchase
the
FC/SATA
Enclosure
Intermix
premium
option
to
combine
EXP100s
with
EXP700s
or
EXP710s
in
the
same
DS4400
Storage
Server
configuration.
v
The
DS4400
controller
units
are
not
compatible
with
the
DS4500
or
FAStT500
controller
units.
The
DS4400
controller
units
are
not
keyed
to
prevent
them
from
being
mistakenly
inserted
in
the
non-supported
storage
server
units.
Before
installing
new
controller
units,
be
sure
that
you
have
the
correct
controller
unit
type;
contact
IBM
technical
support
if
you
are
not
certain.
Do
not
force
fit
the
controller
units
or
the
backplane
might
be
damaged.
©
Copyright
IBM
Corp.
2005
1
Summary of Contents for TotalStorage DS4400
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