User guide

Site preparation 4–15
Hitachi Unified Storage VM Block Module Hardware User Guide
Airflow
The fans in both the control chassis and the drive boxes contain fans to
circulate air through the units from front to back. Air flows in through the
front bezel to the rear of the component and exits through the perforations
in the rear door. The racks do not contain fans.
Equipment noise
The acoustic emission values [loudness in dB (A)] for the HUS VM storage
system storage system are:
• Front/rear = 65 dB (A)
• Both sides = 65 dB (A)
Guaranteed value to
vibration
Less than 2.45m/
S2(0.25G)
Less than 3.9m/s2
(0.4G)No critical
damage for product
function.(Normal
operating with part
replacement)
-
Guaranteed value to
impact
No impact
78.4m/s
2
(8.0G) 15ms
-
Guaranteed value to
seismic wave
Less than 2.45 sq.
meter (0.25 G)(250gal
approx.)
Less than 3.9 m/s
2
(0.4G) (400gal)- No
critical damage for
product
function.(Normal
operating with part
replacement)Below 9.8
m/s
2
(1.0G) (1000gal)-
Ensure own safety with
fall prevention
-
Dust Less than 0.15mg per
cubic meter of air
--
Altitude -60 m to 3,000 m -60 m to 12,000 m
Notes:
1. Environmental specification for operation should be met before the storage system is powered on.
Maximum temperature of 90°F / 32°C should be strictly met at air system air inlet.
2. Recommended temperature range is 21 to 24°C
3. Non-operating condition includes both packing and unpacking conditions unless otherwise
specified.
4. The system and components should be packed in factory packing for shipping and storing
5. No condensation in and around the drive should be observed under any conditions. No
condensation in and around the drive should be observed under any conditions.
6. The above specifications of vibration are applied to all three axes
7. See ASTM D999-01 The Methods for Vibration Testing of Shipping Containers.
8. See ASTM D5277-92 Test Method for Performing Programmed Horizontal Impacts Using an Inclined
Impact Tester.
9. See ASTM D6055-96 Test Methods for Mechanical Handling of Unitized Loads and Large Shipping
Cases and Crates.
10. Time is 5 seconds or less in case of the testing with device resonance point (6 to 7Hz.
Item Operating Not Operating In Storage