fabric.
For
example,
you
can
have
a
SAN
that
contains
one
host
that
runs
on
an
AIX
®
operating
system
and
another
host
that
runs
on
a
Windows
®
operating
system.
You
can
remove
one
SAN
Volume
Controller
node
in
each
I/O
group
from
a
cluster
when
hardware
service
or
maintenance
is
required.
After
you
remove
the
SAN
Volume
Controller
node,
you
can
replace
the
field
replaceable
units
(FRUs)
in
the
SAN
Volume
Controller
node.
All
communication
between
disk
drives
and
all
communication
between
SAN
Volume
Controller
nodes
is
performed
through
the
SAN.
All
SAN
Volume
Controller
node
configuration
and
service
commands
are
sent
to
the
cluster
through
an
Ethernet
network.
Each
SAN
Volume
Controller
node
contains
its
own
vital
product
data
(VPD).
Each
cluster
contains
VPD
that
is
common
to
all
the
SAN
Volume
Controller
nodes
in
the
cluster,
and
any
system
that
is
connected
to
the
Ethernet
network
can
access
this
VPD.
Cluster
configuration
information
is
stored
on
every
SAN
Volume
Controller
node
that
is
in
the
cluster
to
allow
concurrent
replacement
of
FRUs.
When
a
new
FRU
is
installed
and
when
the
SAN
Volume
Controller
node
is
added
back
into
the
cluster,
configuration
information
that
is
required
by
that
SAN
Volume
Controller
node
is
read
from
other
SAN
Volume
Controller
nodes
in
the
cluster.
SAN
Volume
Controller
operating
environment
You
must
set
up
your
SAN
Volume
Controller
operating
environment
using
the
supported
multipathing
software
and
hosts.
Minimum
requirements
You
must
set
up
your
SAN
Volume
Controller
operating
environment
according
to
the
following
requirements:
v
Minimum
of
one
pair
of
SAN
Volume
Controller
nodes
v
Minimum
of
two
uninterruptible
power
supplies
v
One
master
console
per
SAN
installation
for
configuration
Note:
You
can
order
the
master
console
for
the
SAN
Volume
Controller
as
a
master
console
hardware
option
that
comes
preloaded
with
the
master
console
software
or
a
master
console
software
option
that
you
install
on
your
own
hardware.
Features
of
a
SAN
Volume
Controller
2145-8G4
node
The
SAN
Volume
Controller
2145-8G4
node
has
the
following
features:
v
19-inch
rack
mounted
enclosure
v
One
4-port
4
Gbps
fibre-channel
adapter
(four
fibre-channel
ports)
v
8
GB
cache
memory
v
Two
dual-core
processors
Supported
hosts
See
the
following
Web
site
for
a
list
of
the
supported
operating
systems:
http://www.ibm.com/servers/storage/software/virtualization/svc
Chapter
2.
SAN
Volume
Controller
overview
5
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