Chapter 2 — Site Requirements
Environmental Requirements
March 2015
Site Preparation Guide
—
Spectra TFinity Library
30
E
NVIRONMENTAL
R
EQUIREMENTS
The
following
sections
list
the
general
environmental
specifications
for
the
library.
Air Flow
Air
flows
through
the
library
from
front
to
back.
In
data
centers
using
a
hot
aisle/cold
aisle
layout,
position
the
library
so
that
the
cold
aisle
is
in
front
of
the
library
(cold
air
in),
and
the
hot
aisle
is
behind
the
library
(hot
air
out).
Air Quality
Keep
the
location
as
free
of
airborne
particulates
as
possible.
To
eliminate
obvious
sources
of
particulates,
do
not
permit
anyone
to
smoke,
eat,
or
drink
near
the
storage
area,
and
do
not
place
the
library
near
a
copier
or
printer
that
may
emit
toner
and
paper
dust.
Temperature, Humidity, and Altitude
The
library
is
equipped
with
internal
fans
that
operate
as
much
as
is
necessary
for
the
number
of
DBAs
installed.
The
fans
keep
the
library’s
internal
temperature
within
specifications
as
long
as
the
data
center
environment
is
within
specifications.
The
following
table
outlines
the
necessary
data
center
and
storage
area
specifications.
Operating Environmental Specification
Humidity
20%
to
80%
(non
‐
condensing)
Humidity
gradient
Less
than
10%
per
hour
Ambient
temperature
LTO:
50°
F
to
90°
F
(10°
C
to
32°
C)
TS11x0
Technology:
61°
F
to
90°
F
(16°
C
to
32°
C)
Maximum
temperature
change
rate
a
a. The temperature and humidity must be allowed to stabilize in the specified ambient environment for
24 hours.
18°
F
per
hour
(10°
C
per
hour),
non
‐
condensing
Maximum
wet
bulb
temperature
77°
F
(25°
C)
Altitude
Sea
level
to
10,000
ft
(3,048 m)
Storing
a
and Shipping (Non-Operating) Environment Specification
a. The library is in its original packaging. The packaging is designed to protect the library from
condensation caused by extreme temperature variations of 27° F (15° C) or more. When the library is
moved from a cold storage environment to a warm operating environment, it must be acclimated in its
packaging for at least 24 hours before opening to prevent serious condensation damage from occurring.
Humidity
10%
to
95%
(non
‐
condensing)
Temperature
–40°
F
to
149°
F
(–40°
C
to
65°
C)
Altitude
Sea
level
to
40,000
ft
(12,192 m)
