HP 6400/8400 HP StorageWorks 6400/8400 Enterprise Virtual Array User Guide - Page 107

Airflow and Recirculation, Component Airflow Requirements, Configuration Standards

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Estimating the configuration CG requires measuring the CG of the cabinet the product will be installed in. Use the following formula: ΣdcomponentW = dsystem cgW where dcomponent= the distance of interest and W = Weight The distance of a component is its CG's distance from the inside base of the cabinet. For example, if a loaded disk enclosure is to be installed into the cabinet with its bottom at 10U, the distance for the enclosure would be (10*1.75)+2.7 inches. Table 23 Component data HP 10K cabinet CG Filler panel , 3U Fully loaded drive enclosure Filler panel, 1U Controller Pair 1 1U = 1.75 inches U height1 3 3 1 4 Component Data Weight (Lb) 233 1.4 74 0.47 120 X (in) -0.108 0 -0.288 0 -0.094 Y (in) 25.75 2.625 2.7 0.875 2.53 Z (in) 14.21 0 7.95 0 10.64 Airflow and Recirculation Component Airflow Requirements Component airflow must be directed from the front of the cabinet to the rear. Components vented to discharge airflow from the sides must discharge to the rear of the cabinet. Rack Airflow Requirements The following requirements must be met to ensure adequate airflow and to prevent damage to the equipment: • If the rack includes closing front and rear doors, allow 830 square inches (5,350 sq cm) of hole evenly distributed from top to bottom to permit adequate airflow (equivalent to the required 64 percent open area for ventilation). • For side vented components, the clearance between the installed rack component and the side panels of the rack must be a minimum of 2.75 inches (7 cm). • Always use blanking panels to fill all empty front panel U-spaces in the rack. This ensures proper airflow. Using a rack without blanking panels results in improper cooling that can lead to thermal damage. Configuration Standards EVA configurations are designed considering cable length, configuration CG, serviceability and accessibility, and to allow for easy expansion of the system. If at all possible, it is best to configure non HP cabinets in a like manner. Environmental and operating specifications This section identifies the product environmental and operating specifications. NOTE: Further testing is required to update the information in Tables 45-47. Once testing is complete, these tables will be updated in a future release. UPS Selection This section provides information that can be used when selecting a UPS for use with the EVA. The four HP UPS products listed in Table 24 (page 108) are available for use with the EVA and are Environmental and operating specifications 107

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Estimating the configuration CG requires measuring the CG of the cabinet the product will be
installed in. Use the following formula:
Σd
component
W=d
system cg
W
where d
component
= the distance of interest and W = Weight
The distance of a component is its CG’s distance from the inside base of the cabinet. For example,
if a loaded disk enclosure is to be installed into the cabinet with its bottom at 10U, the distance
for the enclosure would be (10*1.75)+2.7 inches.
Table 23 Component data
Component Data
Z (in)
Y (in)
X (in)
Weight (Lb)
U height
1
14.21
25.75
-0.108
233
HP 10K cabinet CG
0
2.625
0
1.4
3
Filler panel , 3U
7.95
2.7
-0.288
74
3
Fully loaded drive enclosure
0
0.875
0
0.47
1
Filler panel, 1U
10.64
2.53
-0.094
120
4
Controller Pair
1
1U = 1.75 inches
Airflow and Recirculation
Component Airflow Requirements
Component airflow must be directed from the front of the cabinet to the rear. Components vented
to discharge airflow from the sides must discharge to the rear of the cabinet.
Rack Airflow Requirements
The following requirements must be met to ensure adequate airflow and to prevent damage to the
equipment:
•
If the rack includes closing front and rear doors, allow 830 square inches (5,350 sq cm) of
hole evenly distributed from top to bottom to permit adequate airflow (equivalent to the required
64 percent open area for ventilation).
•
For side vented components, the clearance between the installed rack component and the
side panels of the rack must be a minimum of 2.75 inches (7 cm).
•
Always use blanking panels to fill all empty front panel U-spaces in the rack. This ensures
proper airflow. Using a rack without blanking panels results in improper cooling that can lead
to thermal damage.
Configuration Standards
EVA configurations are designed considering cable length, configuration CG, serviceability and
accessibility, and to allow for easy expansion of the system. If at all possible, it is best to configure
non HP cabinets in a like manner.
Environmental and operating specifications
This section identifies the product environmental and operating specifications.
NOTE:
Further testing is required to update the information in Tables 45-47. Once testing is
complete, these tables will be updated in a future release.
UPS Selection
This section provides information that can be used when selecting a UPS for use with the EVA. The
four HP UPS products listed in
Table 24 (page 108)
are available for use with the EVA and are
Environmental and operating specifications
107