Hitachi 88-06-0x Hardware Reference Manual page 80

State Controller
Opera 60 dB
ting (Environmental
temperature 32°C
1
or less)
Non- 55 dB
opera
ting
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 configuration, 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
configuration, and operating status.
4. When accessing the dense intermix drive tray, do not work for long times at the
rear of the rack.
Appendix B: System specifications
Hitachi Virtual Storage Platform G900 Hardware Reference Guide
DBS/DBSE, DBL/DBLE
drive trays
60 dB (Environmental
temperature 32°C or
1
less)
55 dB
Environmental specifications
DB60 drive tray
71 dB (Environmental
temperature 32°C or less)
3 4
,
71 dB (Environmental
temperature 32°C or less)
3 4
,
1 2
, ,
1 2
, ,
80