Environmental specifications

The following tables provide the environmental specifications, including operating and non-operating values, for the VSP One Block 20 storage systems.

Temperature

State	Specification
Operating	10°C to 35°C (50°F to 95°F)
Non-operating	-10°C to 50°C (14°F to 122°F)
Transport, storage	-30°C to 60°C (-22°F to 140°F)
Temperature change rate	10°C/hr (18°F/hr)

Humidity

State	Specification
Operating	8% to 80%
Non-operating	8% to 90%
Transport, storage	8% to 90%
Maximum wet bulb temperature	29°C (84.2°F) (noncondensing)

Vibration and impact

Type	State	Specifications
Vibration^1,2	Operating	0.25 Grms, 5-500 Hz]
Vibration^1,2	Non-operating	0.6 Grms, 3-500 Hz]
Impact	Operating	5 G, 11 ms, half sine, three-axis direction 10 G, 6 ms, half sine, three-axis direction
Impact	Non-operating	10 G, 11 ms, half sine, falling direction
Notes: Vibration that is constantly applied to the storage system due to construction works and so on. Guaranteed value for each chassis of the storage system. If vibration or impact exceeding the specified value occurs, the acceleration value to which the storage system is subjected must be reduced to the specified value or lower using equipment for earthquake resistance or seismic isolation so that the storage system can operate continuously. For general 19-inch racks, the lateral vibration amplitude tends to be larger at the upper installation location. Therefore, install the chassis in order from the bottom of the rack without making a vacant space, If the rack frame and storage system are moved while the storage system is operating, operation is not guaranteed.

Altitude (temperature range)

State	Specification
Operating	3,050 m (10°C to 28°C) [10,006 ft. (50°F to 82.4°F)] 950 m (10°C to 35°C) [3,116 ft. (50°F to 95°F)]
Non-operating	-60 m to 12,000 m (-196 ft. to 39,370 ft.)

Environment/atmosphere

Type	State	Specifications
Dust	Operating	0.15 µg/m³ or less
Dust	Non-operating	-
Gaseous contaminants	Operating	Within ANSI/ISA S71.04-2013 G1 classification levels. Keep data center clean by monitoring and controlling gaseous contamination.
Gaseous contaminants	Non-operating

Acoustic level (LpAm)

State	Specification
Operating	CBS: 70 dB or lower DBN2E: 70 dB or lower
Non-operating	CBS: 60 dB or lower DBN2E: 55 dB or lower

Note:

The storage system should be installed in a computer room or data center. If the storage system is installed in a general office, take measures against noise as required.
When you replace an old Hitachi storage system with a new one in a general office, note the following to take measures against noise: The cooling fans in the newer storage systems are smaller so the fan speed (RPM) is higher to maintain the cooling performance. Therefore, the high-frequency noise content is high.

Fire suppression systems and acoustic noise: When activated, some inert-gas fire-suppression systems generate high levels of acoustic noise. High levels of acoustic noise can cause vibrations to the media in the storage system, resulting in I/O errors, performance degradation in the media, and to some extent damage to the drives. Media noise-level tolerance varies among different models, designs, capacities, and manufacturers.

Note: The storage systems and media are not tested for compatibility with fire-suppression systems or pneumatic sirens. In addition, Hitachi does not recommend or claim compatibility with any fire-suppression systems or pneumatic sirens. The customer is responsible for following applicable regulations.

To prevent I/O errors and damage to the storage system due to high levels of acoustic noise:

Install noise-reducing baffles to mitigate the noise to the media in the storage system.
Consult the fire-suppression-system manufacturer about noise-reduction nozzles to protect the media in the storage system.
Locate the storage system as far away as possible from noise sources.
If it can be done safely and without risk of personal injury, shut down the storage system before the noise occurs to prevent data loss due to damage to the media in the storage system.