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controller
(controller
A);
power
to
the
left
power
supply
and
fan
unit
is
routed
through
the
bottom
controller
(controller
B).
If
a
circuit
breaker
has
tripped,
the
condition
might
appear
as
if
a
power
supply
and
fan
unit
has
failed.
The
power
supply
is
no
longer
providing
power
to
the
storage
subsystem.
A
tripped
circuit
breaker
is
indicated
when
all
of
the
following
conditions
are
present:
v
The
Overall
DS4800
Configuration
Needs
Attention
LED
on
the
storage
subsystem
front
bezel
is
turned
on.
v
The
controller
Needs
Attention
LEDs
are
not
turned
on.
v
The
power
supply
and
fan
unit
Needs
Attention
LEDs
are
not
turned
on.
v
The
Service
Action
Allowed
LED
is
turned
on
for
the
power
supply
and
fan
unit
connected
to
the
controller
with
the
open
circuit
breaker.
v
The
DS4000
Storage
Manager
client
shows
the
power
supply
and
fan
unit
has
failed.
Use
the
following
procedure
to
reset
the
circuit
breaker.
Tools
and
Equipment
v
Antistatic
protection
v
Nonconducting
stylus
Electrostatic
discharge
can
damage
sensitive
components
–
Touching
the
storage
subsystem
or
its
components
without
using
a
proper
ground
might
damage
the
equipment.
To
avoid
damage,
use
proper
antistatic
protection
while
handling
any
components.
1.
If
the
alarm
is
sounding,
turn
off
the
alarm.
2.
Check
to
ensure
that
the
external
power
cables
are
completely
plugged
into
the
controllers
and
into
the
power
source.
3.
Put
on
antistatic
protection.
4.
Remove
the
front
bezel
by
grasping
the
sides
and
pulling
the
cover
toward
you.
5.
Check
the
Needs
Attention
LED
on
each
power
supply
and
fan
unit.
shows
the
left
power
supply
and
fan
unit
Service
Action
Allowed
LED
is
the
top,
or
first,
LED,
and
the
Needs
Attention
LED
is
the
second
LED.
On
the
right
power
supply
and
fan
unit
the
Service
Action
Allowed
LED
is
the
bottom,
or
fifth
LED,
and
the
Needs
Attention
LED
is
the
next,
or
fourth,
LED.)
132
IBM
System
Storage
DS4800
Storage
Subsystem:
Installation,
User’s,
and
Maintenance
Guide
Содержание TotalStorage DS4800
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Страница 250: ...Part Number 22R6614 Printed in USA GC26 7845 01 1P P N 22R6614...