Installation Site Requirements
2-8 StorageTek SL8500 Library Guide
Some basic precautions to follow:
■ Do not allow food or drink into the data center.
■ Do not store cardboard, wood, or packing materials in the data center clean area.
■ Identify a separate area for unpacking new equipment from crates and boxes.
■ Do not allow construction or drilling in the data center without first isolating
sensitive equipment. Dry wall and gypsum are especially damaging to equipment.
Seismic or Earthquake Ratings
The requirements for seismic compatibility vary dramatically throughout the world. It
is recommended that you work with local experts familiar with the local code and
requirements. Professional Services can also be engaged to help coordinate this
activity.
Airflow
In the SL8500 library, air flows front-to-back (CIM-to-DEM). The airflow required
depends on the number of components installed in the library. Plan for the cooling
requirements of all data center equipment.
A maximum configured library with 64 tape drives, 24 DC power supplies, four rack
modules, and the electronic control module would require 112.3 m
3
/min. (3956
ft
3
/min.) of air supply to avoid recirculation.
Most configurations are smaller than this and require less airflow. For example, 12 tape
drives, 12 DC power supplies, four robots, one rack module, and the electronic control
module would require 33.3 m
3
/min. (1176 ft
3
/min.).
Table 2–8 Gas Limit Recommendations
Chemical ASHRAE OSHA (PEL) ACGIH NIOSH
Acetic Acid (CH
3
COOH) Not defined 10 ppm Not defined Not defined
Ammonia (NH)
3500 µg/m
3
350 ppm 25 ppm Not defined
Chlorine (Cl)
2100 µg/m
3
31 ppm (c) Not defined 0.5 ppm (c)
Hydrogen Chloride (HCl) Not defined 5 ppm (c) Not defined Not defined
Hydrogen Sulfide (H
2
S)
50 µg/m
3
320 ppm (c) 10 ppm 10 ppm
Ozone (O
3
)
235 µg/m
3
30.1 ppm Not defined Not defined
Petrol-hydrocarbons (C
n
H
n
) Not defined 500 ppm 75 ppm 300 ppm
Sulfur Dioxide (SO
2
)
80 µg/m
3
35 ppm 2 ppm 0.5 ppm (c)
Sulfuric Acid (H
2
SO
4
) Not defined 1 ppm Not defined 1 ppm (c)
Table 2–9 Airflow Requirements (at 1atm, 22°C/72°F)
Component Required Airflow Quantity
Tape drive
0.57m
3
/min. (20 ft
3
/min.) each
64 max
DC power supply
0.71m
3
/min. (25ft
3
/min.) each
24 max
Rack Modules
13.59m
3
/min. (480ft
3
/min.) each
4 max
Electronics Module
4.42m
3
/min. (156ft
3
/min.) each
1
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