Turning
on
the
power
Important:
You
must
turn
on
the
storage
expansion
enclosures
before
the
DS4400
Storage
Server.
The
controllers
might
not
recognize
the
correct
configuration
if
the
hard
disk
drives
are
turned
on
after
the
DS4400
Storage
Server.
For
instructions
on
turning
on
the
storage
expansion
enclosures,
refer
to
the
storage
expansion
enclosure
documentation.
Note:
Always
wait
at
least
30
seconds
between
the
time
you
turn
off
a
power
switch
and
the
time
you
turn
on
the
power
again.
Check
the
system
documentation
for
the
hardware
devices
that
you
intend
to
turn
on,
and
then
determine
the
proper
startup
sequence.
Turn
on
the
power
to
each
device
in
the
following
order:
v
Supporting
devices
v
Storage
expansion
enclosures
v
DS4400
Storage
Server
v
Host
If
you
are
restoring
power
to
the
DS4400
Storage
Server
after
an
emergency
shutdown
or
power
outage,
go
to
“Overtemperature
condition
and
power
supply
shutdown”
on
page
36.
Use
the
following
procedure
to
turn
on
the
DS4400
Storage
Server
and
connected
devices:
1.
Turn
on
the
power
to
the
supporting
devices
(for
example,
Ethernet
switches,
Fibre
Channel
switches,
and
management
stations).
2.
Turn
on
the
storage
expansion
enclosure.
The
controllers
might
not
recognize
the
correct
configuration
if
the
drives
are
powered
up
after
the
storage
server.
For
instructions
on
turning
on
the
storage
expansion
enclosures,
refer
to
the
storage
expansion
enclosure
documentation.
3.
Turn
on
the
power
to
the
DS4400
Storage
Server,
as
follows:
a.
Verify
that
all
communication
and
power
cables
are
plugged
into
the
back
of
the
DS4400
Storage
Server
and
to
a
properly
grounded
ac
electrical
outlet.
b.
Turn
on
the
power-supply
switches
on
the
back
of
the
DS4400
Storage
Server
(see
Figure
23
on
page
25).
You
must
turn
on
both
power-supply
switches
to
take
advantage
of
the
redundant
power
supplies.
24
IBM
TotalStorage
DS4400
Fibre
Channel
Storage
Server:
User’s
Guide
Summary of Contents for TotalStorage DS4400
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