IBM DCS3860, Инструкция по установке, использованию и обслуживанию

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Acoustic noise
Table 12 lists the maximum sound levels emitted by the storage system.
Table 12. DCS3860 sound levels
Measurement Level
Sound power (normal operation) 7.0 bels
Sound power (normal operation with 4 TB
drives) 7.2 bels
These levels are measured in controlled acoustical environments according to ISO
7779 and are reported in accordance with ISO 9296. The declared sound power
levels indicate an upper limit, below which a large portion of machines operate.
Sound pressure levels in your location might exceed the average 1-meter values
stated because of room reflections and other nearby noise. See “Noise” on page 164
to know more about measures needed to ensure hearing protection of the
operating personnel.
Electrical requirements
This section provides information regarding site power and wiring, storage system
AC power requirements, and power cord routing instructions. Consider the
following factors when preparing the installation site:
v
Protective ground – Site wiring must include a protective ground connection to
the AC power source.
Note: Protective ground is also known as safety ground or chassis ground.
v Circuit overloading – Power circuits and associated circuit breakers must
provide sufficient power and overload protection. To prevent possible damage to
the unit, isolate its power source from large switching loads (such as air
conditioning motors, elevator motors, and factory loads).
v
Power failures – If power fails, the unit automatically performs a power on
recovery sequence without operator intervention after power is restored.
Attention: The DCS3860 does not support 90-136V AC sources. It supports
200-240 V AC sources only. Ensure that the AC input is appropriate for the
DCS3860 before turning on the power switches.
Table 13. DCS3860 AC power requirements .
AC Power Requirements Range
Nominal Voltage 180 - 264 V AC
Frequency (Hertz) 50 - 60 Hz
Idle Current 7.55 A
a,b
Maximum Operating Current 7.79 A
a
Maximum Surge Current 7.82 A
a
a.
Typical voltage: 220 V AC, 50 Hz
b.
While the system is idle, it still performs background data scrubbing on all the drives.
However, during regular I/O the system benefits from cache, which uses less power.
Note: The DCS3860 power supplies have C20 power inlets.
Chapter 1. Introduction
21