Sun Microsystems StorageTek StreamLine SL8500, System Assurance Manual

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Site Preparation
86 SL8500: Systems Assurance Guide • July 2011 E24254-01
Air Flow Requirements
The air flow required to cool the SL8500 depends on the total number of
components installed within it, such as tape drives, load sharing DC power
supplies, and accessory racks.
Each of these components contribute to the total airflow required.
Calculations (requirements) for these individual components—using standard
air conditions at sea level (pressure) and 22
°C
/ 72
°F
(temperature)—are:
A maximum configured library with 64 tape drives, 24 DC power supplies, four
rack modules, and the electronic control module would require:
112.0m 3 /min. (3956 ft 3 /min.) of supply air to avoid recirculation.
Most configurations are smaller than this and require less air flow.
An example of a smaller configuration is 12 tape drives split between drive
bays for redundancy, one robot on each level, one rack module, and the
electronic control module.
This would require 33.30m
3
/min. (1176 ft
3
/min.).
The layout of the data center should account for the cooling requirements of
SL8500 as well as other equipment in the center—possibly through the
concept of having a cool aisle and hot aisle in accordance with environmental
best practices and controls.
Seismic or Earthquake Ratings
The requirements for seismic compatibility vary dramatically throughout the
world. As such, a standard “seismic” feature for the SL8500 modular library
system is not offered.
It is recommended that any customer who has seismic concerns work with
local experts who are familiar with the local code and requirements.
Professional Services can also be engaged to help coordinate this activity.
Table 42. Air Flow Requirements
Component Measurement Quantity
Tape drive 0.57m
3
/min. (20 ft
3
/min.) each 64 possible
DC power supply 0.71m
3
/min. (25 ft
3
/min.) each 24 possible
Rack Modules 13.59m
3
/min. (480 ft
3
/min.) each 4 possible
Electronics Module 4.42m
3
/min. (156ft
3
/min.)