C2670M
‐
C
Page
10
OPERATING
TEMPERATURE
Operating
temperature
has
a
significant
impact
on
the
mean
time
between
failures
(MTBF)
of
hard
disk
drives
and
other
sensitive
electronic
components.
Various
published
findings
indicate
that
a
hard
disk
drive
exposed
to
a
temperature
extreme
is
susceptible
to
early
failure.
Generally,
for
every
18°F
increase
(above
room
temperature)
in
operating
temperature,
the
life
expectancy
of
the
hard
drive
decreases
by
35
percent.
For
example,
a
hard
drive
operating
at
115°F
would
suffer
a
58
percent
reduction
in
longevity.
Similarly,
battery
backup
in
a
UPS
operating
at
77°F
(25°C)
has
an
average
life
expectancy
of
3
to
5
years.
This
dramatically
drops
to
1.5
years
if
the
UPS
is
operated
at
104°F
(40°C).
While
Endura
equipment
has
a
specified
range,
the
best
performance
and
longevity
is
attained
when
the
operating
temperature
is
maintained
at
or
under
77°F
(25°C).
For
the
purposes
of
Endura
equipment,
the
specified
operating
temperature
is
the
actual
temperature
directly
in
front
of
the
bezel
of
the
chassis.
Pelco
products
have
undergone
an
extensive
amount
of
design
and
engineering
to
keep
the
operating
temperature
of
internal
components
as
close
to
the
ambient
temperature
of
the
room
as
possible.
As
such,
maintaining
the
right
ambient
temperature
at
the
front
of
the
unit
is
critical.
The
rack
‐
mountable
Endura
servers
use
active
cooling
by
drawing
air
in
from
the
front
to
the
back.
The
most
sensitive
components
are
typically
mounted
at
the
front
of
the
unit
to
take
advantage
of
cooler
ambient
air
temperatures.
Proper
rack
design
and
temperature
control
are
critical
components
for
system
stability
and
health.
When
installing
an
Endura
system,
follow
these
general
guidelines:
•
Ensure
proper
ambient
temperature
is
always
maintained
in
the
rack
room
•
Ensure
that
the
ambient
temperature
at
the
front
of
each
unit
is
within
the
operating
specification
range
•
Ensure
proper
heat
exhaust
in
the
back
of
the
rack
•
If
multiple
components
are
placed
in
the
same
rack,
ensure
that
no
heat
traps
exist
in
the
rack
(when
a
deeper
component
is
placed
directly
above
a
shorter
component,
the
extra
depth
of
one
unit
creates
a
heat
that
can
trap
the
heat
generated
and
exhausted
by
the
shorter
unit)
Table
C
on
page
11
describes
the
environmental
operating
conditions
for
Endura
components
and
servers.
