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Product Description

OceanStor 2800 V3 V300R006

This document is applicable to OceanStor 2800 V3. It describes the positioning, features, typical applications, architecture, specifications, environmental requirements, standards compliance, and granted certifications of the OceanStor 2800 V3 storage system.
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Heat Dissipation and Noise

Heat Dissipation and Noise

A storage system can run steadily using the heat dissipation system carried in its own fan modules. An external device is necessary to remove the hot air discharged from a storage system into the equipment room to ensure proper air circulation.

Heat Dissipation

Traditional heat dissipation modes are as follows:

  • Air goes into a controller enclosure from the front end and out of its back end.

    Cooling air enters through small holes on the interface modules. After dissipating the heat of interface modules, controllers, and power modules, the air is discharged by fans. The controller enclosure dynamically adjusts rotational speed of the fans based on the operational temperature of the storage system.

  • Air goes into a disk enclosure from the front end and out of its back end.

    Cooling air enters through the space between disks, passing the midplane, into the power modules and expansion modules. After dissipating the heat, the air is discharged by fans. The disk enclosure dynamically adjusts rotational speed of the fans based on the operational temperature of the storage system.

For better maintenance, ventilation, and heat dissipation, pay attention to the following when installing the storage system in the cabinet:

  • To ensure smooth ventilation, the cabinet should be at least 100 cm (39.4 inches) away from the equipment room walls and at least 120 cm (47.24 inches) away from other cabinets (that are in front of or behind).
  • To keep air convection between the cabinet and the equipment room, no enclosed space is allowed in the cabinet. 1 U (44.45 mm, 1.75 inches) space should be left above and below each device.

The airflow parameters of the storage system are shown in Table 7-7.

Table 7-7 Airflow parameters of storage systems

System Airflow

Value

Controller enclosure

  • 192 CFMa (maximum fan speed)
  • 68 CFM (25°C)

4 U disk enclosure

  • 151 CFM (maximum fan speed)
  • 52 CFM (25°C)

4 U high-density disk enclosure

  • 210 CFM (maximum fan speed)
  • 116 CFM (25°C)

a: cubic feet per minute (CFM)

The heat dissipation parameters of the storage system are shown in Table 7-8.

Table 7-8 Heat dissipation parameters of the storage system

Maximum Heat Dissipation

2800 V3

Controller enclosure

2044.47 BTUa/h

4 U disk enclosure

1772.88 BTU/h

4 U high-density disk enclosure

4265.00 BTU/h

a: BTU, British Thermal Unit.

Noise

The disks and fans make noise when in operation, with fans being the major noise source. The intensity of fan rotation is associated with the temperature. A higher temperature leads to greater rotational speed by the fans, which in return creates greater noise. Therefore, there is a direct correlation between the noise made by a storage system and the ambient temperature in the equipment room.

When the temperature is 25°C, the parameters of the noise generated by the storage system are shown in Table 7-9.

Table 7-9 Noise parameters of storage systems

Device

Sound Power

2 U controller enclosure

65.1 dB

4 U disk enclosure

66.3 dB

4 U high-density disk enclosure

75.4 dB

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Updated: 2019-07-12

Document ID: EDOC1000138808

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