c.
When
the
recovery
procedure
is
completed,
select
Recheck
in
the
Recovery
Guru.
This
action
reruns
the
Recovery
Guru
to
ensure
that
the
problem
has
been
fixed.
d.
If
the
problem
has
not
been
fixed,
contact
your
IBM
service
representative.
Do
not
turn
off
power
until
all
problems
are
corrected.
5.
Check
the
back
of
the
storage
subsystem,
and
verify
that
the
Cache
Active
LED
is
off.
If
the
Cache
Active
LED
is
on
steady,
the
cache
contains
data.
Wait
for
the
data
to
clear
from
cache
memory
before
turning
off
the
power.
6.
Check
the
LEDs
on
the
storage
expansion
enclosures
to
verify
that
all
Drive
Active
LEDs
are
on
steady
(not
blinking).
If
one
or
more
LEDs
are
blinking,
data
is
being
written
to
or
from
the
drives.
Wait
for
all
Active
LEDs
to
stop
blinking.
7.
Turn
off
the
AC
power
switch
on
the
back
of
each
controller
in
the
storage
subsystem.
shows
the
location
of
the
AC
power
switch
on
a
controller.)
Note:
Until
the
power
switch
on
each
controller
is
turned
off,
power
still
remains
turned
on
for
the
both
controllers;
therefore,
the
seven-segment
display
on
each
controller
stays
on
until
the
power
switch
on
each
controller
is
turned
off.
8.
Turn
off
both
power
switches
on
the
back
of
each
storage
expansion
enclosure
in
the
configuration.
9.
After
you
perform
the
necessary
maintenance
procedures,
turn
on
the
power
using
the
procedure
in
Restoring
power
after
an
unexpected
shutdown
The
storage
subsystem
might
shut
down
unexpectedly
under
any
of
the
following
conditions:
Attention:
There
might
be
a
loss
of
access
to
data
in
each
of
the
following
cases.
v
The
internal
temperature
of
the
storage
subsystem
exceeds
the
maximum
operating
temperature
(an
over-temperature
condition).
If
both
power
supply
and
fan
units
fail
or
are
unable
to
maintain
an
internal
temperature
below
70°
C
(158°
F),
one
or
both
of
the
power
supplies
in
the
storage
subsystem
will
shut
down.
If
both
power
supply
and
fan
units
shut
down,
the
unit
is
inoperable.
The
DS4000
Storage
Manager
client
warns
you
if
the
temperature
of
the
unit
is
rising
before
it
has
risen
sufficiently
to
shut
down
the
power
supplies.
The
first
warning
comes
when
the
storage
subsystem
internal
temperature
exceeds
45°
C
(113°
F).
The
storage
subsystem
shuts
down
if
the
temperature
rises
to
70°
C
(158°
F).
v
In
the
DS4800
Storage
Subsystem,
the
right
power
supply
and
fan
unit
is
linked
to
controller
A,
and
the
left
power
supply
and
fan
unit
is
linked
to
controller
B.
If
one
power
supply
and
fan
unit
has
shut
down
and
the
controller
that
is
linked
to
the
other
power
supply
and
fan
unit
is
removed,
the
DS4800
will
be
inoperable.
To
increase
protection
against
power
loss,
always
make
sure
that
both
power
supply
and
fan
units
are
plugged
in
and
are
operational.
v
There
is
a
general
power
failure
or
a
loss
of
power
to
the
unit.
110
IBM
System
Storage
DS4800
Storage
Subsystem:
Installation,
User’s,
and
Maintenance
Guide
Содержание TotalStorage DS4800
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