Redundant host and drive loops, Ds4100 base storage server configurations, Redundant – IBM Partner Pavilion DS4100 User Manual
Page 69: Host, Drive, Loops
connect
more
than
two
hosts
to
the
fibre
channel
storage
server
through
switches.
The
illustrations
in
the
following
sections
show
common
host
system
configurations.
Note:
The
default
configuration
is
one
partition.
Four-partition,
eight-partition,
and
sixteen-partition
configuration
upgrades
are
available
as
upgrade
options.
You
must
perform
partition
upgrades
one
increment
at
a
time,
which
means
you
cannot
upgrade
directly
from
a
four-partition
configuration
to
a
sixteen-partition
configuration;
in
this
case,
you
would
have
to
upgrade
from
a
four-partition
configuration
to
an
eight-partition
configuration,
and
then
from
the
eight-partition
configuration
to
a
sixteen-partition
configuration.
Contact
your
IBM
reseller
or
marketing
representative
for
more
information.
Redundant
host
and
drive
loops
This
section
provides
examples
of
DS4100
host
fibre
channel
configurations.
DS4100
base
storage
server
configurations:
This
section
provides
the
following
examples
of
DS4100
base
storage
server
host
fibre
channel
configurations.
v
Redundant
host
and
drive
fibre
channel
loop
configurations,
as
shown
in
v
Single
SAN
fabric
configuration,
as
shown
in
v
Dual
SAN
fabric
configuration,
with
an
additional
DS4100
and
a
DS4000
EXP100
attached,
as
shown
in
v
Two
clusters,
as
shown
in
Note:
These
configurations
have
host
and
drive
path
failover
protection
and
are
recommended
for
high
availability.
Chapter
2.
Installing
the
storage
server
37