Removing
and
installing
power
modules
The
BladeCenter
T
unit
is
separated
into
two
power
domains.
To
support
devices
in
power
domain
B,
a
power-supply
module
option
(consisting
of
two
power
modules)
must
be
installed.
The
following
table
summarizes
the
modules
that
are
powered
by
each
power
domain.
Power
domain
Power-module
bays
Modules
powered
by
the
power
domain
A
1
and
2
I/O-module
bays
1
and
2
Management-module
bays
1
and
2
Media
tray
Blade
bays
1
through
4
B
3
and
4
Blade
bays
5
through
8
I/O-module
bays
3
and
4
All
four
blowers
are
required
for
redundant
system
operation.
Power
for
all
four
blowers
is
shared
by
all
installed
power
modules.
One
failed
blower
creates
a
nonredundant
configuration.
If
a
power
module
fails
or
an
input
power
failure
occurs,
BladeCenter
T
units
that
are
configured
for
redundant
power
operation
will
operate
in
a
nonredundant
mode.
You
must
replace
the
failing
power
module
or
restore
input
power
as
soon
as
possible
to
regain
redundant
power
operation.
Important:
1.
The
power
modules
must
be
installed
in
pairs
in
a
domain
and
must
match
each
other
in
capacity
(wattage,
amperage,
and
so
on).
2.
To
provide
true
redundant
power,
BladeCenter
T
power
modules
1
and
3
must
be
connected
to
a
different
input
power
source
than
power
modules
2
and
4.
46
BladeCenter
T
Type
8720
and
8730:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide
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