Table
19-1
Types
of
maintenance
for
fan
unit
Configuration
Active/hot
Active/cold
Inactive/hot
Inactive/cold
System
stopped
Building
block
configuration
Supported
Unsupported
(*1)
Unsupported
Unsupported
(*1)
Supported
(*2)
*1:
If
any
physical
partition
is
currently
operating,
the
crossbar
box
cannot
be
powered
off.
*2:
All
the
physical
partitions
must
be
powered
off,
and
the
system
must
be
completely
shut
down.
Table
19-2
Maintenance
flow
Details
of
update
process
Replacement
1
Preparation
2
Removing
a
fan
unit
3
Installing
a
fan
unit
4
Restoring
the
system
19.2.1
Types
of
maintenance
lists
the
types
of
maintenance
for
the
fan
units.
For
the
definition
of
maintenance,
see
"
."
19.2.2
Maintenance
flow
lists
the
sequence
of
the
maintenance
procedure
for
the
fan
units.
19.2.3
Precautions
for
replacement
Note
the
following
points
when
replacing
a
fan
unit:
■
When
replacing
multiple
fan
units,
replace
one
unit
at
a
time.
If
a
redundant
configuration
cannot
be
assured,
perform
cold
replacement.
■
The
cooling
fans
have
a
redundant
configuration.
Thus,
the
system
can
continue
operating
even
if
one
of
the
fans
in
the
fan
units
experiences
a
failure.
Avoid
operating
the
system
with
a
faulty
fan
for
an
extended
period
and
replace
the
fan
unit
containing
the
failed
fan
as
soon
as
possible.
19.3
Enabling
the
Removal
of
a
Fan
Unit
This
section
describes
the
preparations
that
must
be
completed
prior
to
removing
a
Chapter
19
Maintaining
the
Fan
Units
of
the
Crossbar
Box
325
Summary of Contents for SPARC M10-4
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