Statement
5
1
2
Use
the
following
procedure
to
turn
off
the
power:
1.
Before
proceeding,
use
the
storage-management
software
to
determine
the
status
of
the
system
components
and
special
instructions.
The
operating
system
software
might
require
you
to
perform
other
procedures
before
you
turn
off
the
power.
2.
Use
the
storage-management
software
to
check
the
status
of
the
storage
subsystem.
Correct
problems
that
are
reported
before
you
turn
off
the
power.
3.
Perform
the
following
steps:
a.
Stop
all
I/O
activity
to
the
storage
subsystem
and
attached
storage
expansion
enclosures.
Make
sure
of
the
following:
v
All
of
the
green
Drive
active
LEDs
on
the
front
of
the
storage
subsystem
(and
on
all
attached
storage
expansion
enclosures)
are
not
flashing.
v
The
green
Cache
active
LEDs
located
on
the
controller
modules
viewable
from
the
back
of
the
DS4300
storage
subsystem
are
off.
b.
Before
the
storage
subsystem
is
powered
off,
use
the
operating
system
software
to
either
disconnect
the
storage
subsystem
logical
drives
from
the
host
or
to
flush
the
logical
drive
data
cache
in
the
host
server
memory.
Attention:
To
turn
off
all
power
to
the
storage
subsystem,
you
must
turn
off
both
power-supply
switches
and
disconnect
both
power
cords.
Use
the
procedure
in
step
4
for
the
proper
shutdown
sequence.
4.
Turn
off
the
power
to
each
device
based
on
the
following
shutdown
sequence:
a.
Turn
off
power
to
the
host
before
the
storage
subsystem.
If
the
host
must
stay
powered
on
to
support
an
existing
network,
see
the
operating
system
documentation
for
information
about
disconnecting
the
storage
subsystem
logical
drives
from
the
host
before
the
storage
subsystem
is
powered
off.
b.
Turn
off
power
to
the
storage
subsystem
before
you
turn
off
power
to
the
storage
expansion
enclosures.
Turn
off
both
power
supply
switches
on
the
back
of
the
storage
subsystem.
c.
Turn
off
power
to
other
supporting
devices
(for
example,
management
stations,
fibre-channel
switches,
or
Ethernet
switches).
Note:
You
do
not
need
to
perform
this
step
if
you
are
servicing
only
the
storage
subsystem.
5.
After
you
perform
the
necessary
maintenance
procedures,
turn
on
the
power
using
the
procedure
in
“Turning
on
the
storage
subsystem”
on
page
92.
Restoring
power
after
an
unexpected
shutdown
The
storage
subsystem
might
shut
down
unexpectedly
under
any
of
the
following
conditions:
Attention:
There
might
be
data
loss
in
each
of
the
following
cases:
94
IBM
TotalStorage
DS4300
Fibre
Channel
Storage
Subsystem:
Installation,
User’s,
and
Maintenance
Guide
Summary of Contents for TotalStorage DS4300 Turbo
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