Hitachi 88-02-0 Series - Page 79

State Controller DBS, DBL drive trays DB60 drive tray
Opera
ting
60 dB
(Environmental
temperature 32°C
or less)
1
60 dB (Environmental
temperature 32°C or
less)
1
71 dB (Environmental
temperature 32°C or less)
1
,
2
,
3
,
4
Non-
opera
ting
55 dB 55 dB 71 dB (Environmental
temperature 32°C or less)
1
,
2
,
3
,
4
Notes:
1. The internal temperature of the system controls the rotating speed of the fan
module. Therefore, this standard value might be exceeded if the maximum load
continues under high-temperature environment or if a failure occurs in the
system.
2. Sound pressure level (LA) changes from 66 dB or 75 dB, according to the ambient
temperature, drive conguration, and operating status. Maximum volume can
reach 79 dB during maintenance procedure for a failed ENC or power supply.
3. Acoustic power level (LwA) measured by the ISO 7779 standard is 7.2 B. This value
changes from 7.2 B to 8.1 B, according to the ambient temperature, drive
conguration, and operating status.
4. When accessing the dense intermix drive tray, do not work for long times at the
rear of the rack.
Environmental specications
Appendix B: System specications
Hitachi Virtual Storage Platform G900 Hardware Reference Guide 79