IBM 9835-415, Руководство по развертыванию, Страница: 59 / 126

Acoustic declaration
This information lists the acoustic (sound power) levels for the FlashSystem
A9000R system.
CAUTION:
Depending upon local conditions, the sound pressure might exceed 85 dB(A)
during service operations. Hearing protection must be worn when you are in a
room that has a FlashSystem A9000R system while either the front or rear door
is open or when the front and rear doors are not installed.
The acoustic levels are shown in Table 13. These measurements are based on a
typical FlashSystem A9000R configuration with 8 grid controllers and 4 flash
enclosures. All measurements are in conformance with ISO 7779 and declared in
conformance with ISO 9296.
Notes:
1.
LWAd is the statistical upper-limit A-weighted sound-power level (rounded to
the nearest 0.1 B).
2. LpAm is the mean A-weighted emission sound-pressure level that is measured
at the 1-meter bystander positions (rounded to the nearest dB).
3. 10 dB (decibel) = 1 B (bel)
Table 13. Acoustic declaration
Declared A-weighted sound
power level, LWAd (B) Declared A-weighted sound
pressure level, LpAm (dB)
Operating 8.0 62
Idle 8.0 62
Note: Government regulations (such as those prescribed by OSHA or European
Community Directives) may govern noise level exposure in the workplace and
may apply to you and your server installation. The actual sound pressure levels in
your installation depend upon a variety of factors, including the number of racks
in the installation; the size, materials, and configuration of the room; the noise
levels from other equipment; the room ambient temperature, and employees'
location in relation to the equipment. Further, compliance with such government
regulations also depends upon a variety of additional factors, including the
duration of employee exposure and whether employees wear hearing protection.
IBM recommends that you consult with qualified experts in this field to determine
whether you are in compliance with the applicable regulations.
Operating vibration requirements
The vibration levels that are designed for the FlashSystem A9000R system comply
with class V1L requirements included in the product classes for vibration.
The FlashSystem A9000R system is designed to operate under the vibration V1L
levels that are described in the following table. More information includes random
vibration PSD profile breakpoints and operational shock levels.
Chapter 4. Physical installation site requirements
37