Acoustic Noise
The acoustic level is measured under the following conditions in accordance with
ISO7779 and the value is declared based on ISO9296. In a normal installation area (data
center / general office), the storage system is surrounded by different elements from the
following measuring conditions according to ISO, such as noise sources other than the
storage system (other devices), the walls and ceilings that reflect the sound. Therefore,
the values described in the table do not guarantee the acoustic level in the actual
installation area.
■
Measurement environment: In a semi-anechoic room whose ambient temperature is
23ºC±2ºC.
■
Device installation position: The Controller Chassis is at the bottom of the rack and
the Drive Box is at a height of 1.5m in the rack.
■
Measurement position: 1m away from the front, rear, left or right side of the storage
system and 1.5m high (at four points).
■
Measurement value: Energy average value of the four points (front, rear, left and
right).
The recommendation is to install the storage system in a computer room in a data
center. It is possible to install the storage system in a general office, however, take
measures against noise as required. When you replace an existing storage system with
another system in a general office, especially note the following: The cooling fans in the
storage system are downsized to enhance the high density of the storage system. As a
result, the rotation number of the fan is increased than before to maintain the cooling
performance. Therefore, the rate of the noise occupied by high-frequency content is
high.
Environmental specifications
Appendix B: System specifications
Hitachi Virtual Storage Platform F350, F370 Hardware Reference Guide
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