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Chapter
7.
Storage
system
logical
partition
A
storage
system
logical
partition
allows
the
division
of
a
single
server
into
two
completely
independent
virtual
storage
systems.
A
logical
partition
uses
hardware
and
firmware
to
logically
allocate
the
resources
between
partitions.
The
storage
system
logical
partition
function
is
currently
supported
on
the
DS8300
Model
9A2.
It
provides
two
virtual
storage
systems
in
one
physical
machine.
Each
storage
system
logical
partition
can
run
its
own
level
of
licensed
machine
code.
The
resource
allocation
for
processors,
memory,
and
I/O
slots
in
the
two
storage
system
LPARs
on
the
DS8300
is
divided
into
a
fixed
ratio
of
50/50.
Note:
v
A
storage
system
logical
partition
must
be
associated
with
the
same
storage
system
logical
partition.
v
Each
storage
system
logical
partition
can
have
255
logical
subsystems
(LSSs)
with
LSS
IDs
0–254.
DS8300
LPAR
implementation
The
DS8300
Model
9A2
provides
a
split
between
the
resources
in
a
50/50
ratio.
Each
storage
image
uses
the
machine
type/model
number/serial
number
of
the
DS8300
Model
9A2
base
frame.
The
frame
serial
number
ends
with
a
0.
The
last
character
of
the
serial
number
is
replaced
by
a
number
in
the
range
one
to
eight
that
uniquely
identifies
the
DS8000
image.
This
character
is
a
1
or
a
2,
because
there
are
only
two
available
storage
images.
The
serial
number
distinguishes
between
the
storage
images
in
the
GUI
and
CLI.
The
serial
number
is
also
used
for
licensing
and
the
allocation
of
licenses
between
the
storage
images.
The
following
figure
illustrates
the
DS8300
LPAR
resource
allocation
that
is
allowed.
©
Copyright
IBM
Corp.
2004,
2005
95
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