Reference Guide

4.15
3PAR InServ E-Class/F-Class Storage Server Physical Planning Manual
4.5.1 Maintaining the Optimal Temperature
The level of cooling required for the 3PAR InServ Storage Servers is quite different from the air-
conditioning used in offices. Comfort air-conditioning systems are designed for the lower heat
and higher moisture generated by the human body. In contrast, equipment has high heat
output that is moisture-free (sensible heat). In comfort systems, sensible heat normally
produces 60 to 70 percent of the load, whereas the dry heat of electronic equipment produces
a sensible heat ratio of over 95 percent.
Prior to installation, verify that the operating site is equipped with a cooling system that can
support all thermal emissions. Use the maximum thermal emissions of storage server
components listed in Table 4-6 on page 4.16 to estimate the cooling requirements for an InServ
Storage Server based on a specific system configuration.
Proper site layout is critical to ensure the ambient temperature near the intake of the system
does not rise beyond the system specifications. Exceeding the maximum ambient temperature
Temperature gradient
Operating
Nonoperating
59°F/15°C/hr
68°F/20°C/hr
Relative humidity 20–80 percent non-condensing, maximum gradient
10 percent per hour
Vibration Controller Chassis:
0.1g 5-100Hz swept sine per GR-63-CORE R4-56
Drive Chassis:
0.21g 5-500Hz
Shock Controller Chassis:
10g, 11ms half sine
Drive Chassis:
5g, 10ms half sine
Table 4-5. Environmental Specifications for InServ Storage Servers (continued)
Specification Value