Interface
ports
The
DS4400
Storage
Server
has
the
following
interface
ports:
v
Host
mini-hub
v
Drive
mini-hub
v
Ethernet
The
mini-hub
ports
are
used
for
data
transfer
between
hosts
or
storage
expansion
enclosures
and
RAID
controllers
in
the
DS4400
Storage
Server.
Ethernet
ports
are
available
for
storage
subsystem-management.
The
DS4400
Storage
Server
interface
ports
are
shown
in
Figure
17.
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb/s
1 Gb/s
Host
mini-hub
ports
Ethernet interface ports
Drive
mini-hub
ports
For
more
information
about
connecting
the
DS4400
Storage
Server
and
storage
expansion
enclosures
(sometimes
referred
to
as
expansion
units)
using
the
host
and
drive
interface
ports,
refer
to
the
IBM
DS4400
Fibre
Channel
Storage
Server
Installation
Guide
.
Host
interface
ports
The
DS4400
Storage
Server
comes
with
host-side
mini-hubs
1
and
2
installed.
Each
mini-hub
provides
host
loop
connectivity
and
self-diagnostic
features.
Host
mini-hubs
connect
to
the
controller
in
pairs.
When
fully
configured,
the
DS4400
Storage
Server
can
accommodate
four
host-side
mini-hubs,
two
per
controller.
mini-hubs
1
and
3
connect
to
the
top
controller
(Controller
A)
and
mini-hubs
2
and
4
connect
to
the
bottom
controller
(Controller
B),
as
shown
in
Figure
18
on
page
15.
To
ensure
redundancy,
you
must
connect
each
host
to
both
controllers
through
the
appropriate
mini-hub.
Attention:
If
one
of
the
two
ports
in
the
host
mini-hub
is
connected
to
the
Fibre
Channel
switch,
the
other
port
must
be
left
empty.
This
restriction
is
not
applicable
when
you
directly
connect
the
FC
HBA
ports
to
the
host
side
mini-hub
ports.
Figure
17.
DS4400
Storage
Server
interface
ports
14
IBM
TotalStorage
DS4400
Fibre
Channel
Storage
Server:
User’s
Guide
Summary of Contents for TotalStorage DS4400
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