4.
Substantial
deviations
from
the
suggested
operating
range,
in
either
direction,
if
sustained
for
extended
periods
of
time,
will
expose
the
unit
to
greater
risk
of
failure
from
external
causes.
Heat
output,
airflow,
and
cooling
The
maximum
heat
output
of
the
EXP100
is
390
watts
(1088
BTU/hr).
Each
EXP100
rack-mounted
unit
requires
an
airflow
of
2.5
m
3
(87
ft
3
)
per
minute.
The
input
air
temperature
to
all
racks
should
be
in
the
range
10°
C
-
35°
C
(50°
F
-
95°
F).
Note:
In
general,
disk
subsystem
reliability
tends
to
decrease
as
the
ambient
temperature
of
the
environment
in
which
it
is
being
used
increases.
The
ambient
temperature
in
the
immediate
area
of
the
storage
expansion
enclosure
should
be
kept
near
22
degrees
C
(72
degrees
F),
or
lower,
to
provide
better
reliability.
When
racks
that
contain
many
EXP100s
are
to
be
installed
together,
the
following
requirements
must
be
met
to
ensure
that
the
EXP100s
are
adequately
cooled:
v
Air
enters
at
the
front
of
the
rack
and
leaves
at
the
back.
To
prevent
the
air
that
is
leaving
the
rack
from
entering
the
intake
of
another
piece
of
equipment,
you
must
position
the
racks
in
alternate
rows,
back-to-back
and
front-to-front.
This
arrangement
is
known
as
“cold
aisle/hot
aisle”
and
is
shown
in
v
Where
racks
are
in
rows,
each
rack
must
touch
the
rack
that
is
next
to
it
to
reduce
the
amount
of
hot
air
that
can
flow
around
from
the
back
of
the
rack
into
the
intakes
of
the
expansion
enclosures
that
are
in
that
rack.
You
should
use
Suite
Attach
Kits
to
completely
seal
any
gaps
that
remain
between
the
racks.
For
details
about
Suite
Attach
Kits,
contact
your
marketing
representative.
v
Where
racks
are
in
rows
front-to-front
or
back-to-back,
a
gap
of
at
least
1220
mm
(48
in.)
must
separate
the
rows
across
the
cold
aisle.
v
To
ensure
correct
airflow
in
each
rack,
the
rack
filler
plates
must
be
installed
in
unused
positions.
Also,
all
the
gaps
in
the
front
of
the
racks
must
be
sealed,
including
the
gaps
between
the
expansion
enclosures.
Chapter
1.
Introduction
23
Summary of Contents for TotalStorage EXP100
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