Note:
If
the
power
cords
are
not
connected,
turn
off
both
power
switches
on
all
modules
in
the
configuration
before
connecting
power
cords
or
turning
on
the
main
circuit
breakers.
Attention:
If
you
are
restarting
the
system
after
a
normal
shutdown,
wait
at
least
60
seconds
before
you
turn
on
the
power.
3.
Turn
on
the
main
circuit
breakers
in
the
cabinet.
Attention:
You
must
turn
on
power
to
each
attached
storage
expansion
enclosure
before
turning
on
power
to
the
DS4800
Storage
Subsystem
to
ensure
that
the
controllers
complete
the
startup
process.
If
the
DS4800
controllers
do
not
find
any
drives
present
during
the
initial
power
on
sequence,
the
DS4800
will
not
complete
the
startup
process.
This
will
prevent
controllers
A
and
B
from
communicating
with
each
other,
and
any
factory-installed
premium
features
will
not
be
activated
correctly.
4.
Turn
on
both
power
switches
on
each
storage
expansion
enclosure
attached
to
the
storage
subsystem.
While
each
storage
expansion
enclosure
powers
up,
the
green
and
amber
LEDs
on
the
front
and
back
of
the
storage
expansion
enclosure
turn
on
and
off
intermittently.
Depending
on
your
configuration,
it
can
take
several
minutes
for
each
storage
expansion
enclosure
to
power
up.
Check
the
LEDs
on
the
front
and
back
of
all
the
storage
expansion
enclosures.
Verify
that
no
Needs
Attention
or
Enclosure
ID
LEDs
light
on
any
of
the
storage
expansion
enclosures.
To
verify
the
fibre
channel
connections
between
the
drive
expansion
enclosures,
make
sure
that
no
Port
Bypass
LEDs
for
connections
to
other
storage
expansion
enclosures
are
lit.
Only
the
Port
Bypass
LED
of
the
ESM
port
that
connects
directly
to
the
DS4800
Storage
Subsystem
drive
port
should
be
lit.
Note:
The
drive
activity
LEDs
will
flash
slowly
(once
every
2
seconds)
until
the
drive
is
started
by
the
DS4800
controller.
5.
Turn
on
the
AC
power
switch
on
the
back
of
each
controller
in
the
storage
subsystem.
shows
the
location
of
the
AC
power
switches
on
the
controllers.
Depending
on
the
number
of
storage
expansion
enclosures
in
the
configuration,
the
DS4800
Storage
Subsystem
might
take
several
minutes
to
power
up.
The
AC power
switch
AC power
connector
AC power
switch
AC power
connector
Controller A
Controller B
ds48040
Figure
70.
AC
power
switches
on
the
controllers
98
IBM
System
Storage
DS4800
Storage
Subsystem:
Installation,
User’s,
and
Maintenance
Guide
Summary of Contents for TotalStorage DS4800
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