Chapter
3.
Installing
and
replacing
devices
This
chapter
contains
information
about
installing
and
replacing
the
ESM
CRU,
the
power
supply
CRU,
and
the
fan
CRU.
Adding
a
new
EXP100
to
an
existing
and
configured
drive
loop
You
can
add
up
to
eight
EXP100s
to
a
redundant
Fibre
Channel
loop.
DS4100s
and
DS4300s
support
one
redundant
drive
loop.
DS4400s,
DS4500s,
and
DS4800s
support
up
to
two
redundant
drive
loops.
Before
you
cable
your
EXP100
to
a
loop,
refer
to
the
Fibre
Channel
Cabling
Instructions
that
came
with
your
DS4000
storage
subsystem
for
specific
instructions.
This
section
contains
the
following
topics:
v
v
v
Determining
firmware
levels
of
the
new
and
existing
EXP100s
New
EXP100
storage
expansion
enclosures
are
shipped
from
the
factory
with
R3
ESM
firmware
installed.
However,
there
might
be
storage
enclosures
in
warehouse
depots
and
at
resellers
that
were
shipped
before
the
R3
release.
In
the
event
that
your
new
EXP100s
have
different
ESM
firmware
versions
than
the
existing
EXP100s,
you
must
make
corrections
to
match
the
ESM
firmware
as
soon
as
background
firmware
operations,
such
as
rebuilds
and
copybacks,
have
completed.
Use
the
options
described
in
for
your
particular
upgrade
procedure.
In
certain
cases,
you
must
schedule
down
time
for
the
upgrade
because
there
can
be
no
I/O
activity,
including
background
firmware
operations,
to
the
storage
subsystem
at
the
time
of
the
upgrade.
For
more
information
about
the
different
types
of
EXP100
ESM
firmware,
see
Refer
to
to
find
out
whether
the
ESM
firmware
in
your
new
EXP100
is
compatible
with
the
ESM
firmware
in
your
existing
EXP100.
Table
8.
New
EXP100
expansion
enclosure
and
existing
EXP100
expansion
enclosure
firmware
compatibility
If
the
firmware
version
of
the
new
EXP100
enclosure
is:
Then
you
must
ensure
that
the
firmware
in
the
existing
EXP100
expansion
enclosures
in
the
drive
loop
is:
R1
R1
R2
R2
or
R3
R3
R2
or
R3
©
Copyright
IBM
Corp.
2004,
2005
63
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Summary of Contents for TotalStorage EXP100
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