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User Guide
Voltage (per power supply)
Maximum inrush current (per power
Caution: The Ultrastar Data102 can only be plugged into high line (220-240 VAC). If the unit
is plugged into low line (110-127 VAC), the PSU will report a "Critical" state when status pages
are queried using SES. In this case, the enclosure will power up, but the drives will not. The
enclosure will remain in low-power mode.
1.14 ESD
The enclosure is designed to dissipate all electrostatic discharge (ESD) to the chassis base. Ensure that
there is sufficient electrical and mechanical connection from the chassis base to the rack rails, and that the
rack itself is tied to earth ground. Precautions must be taken to ensure that the system is not exposed to
ESD while handling components or servicing the unit.
The unit must be grounded in accordance with all local/regional and national electrical codes.
1.15 Enclosure Cooling
The Ultrastar Data102 has an advanced thermal algorithm running within the logical enclosure services
process called the SEP that monitors all of the temperature sensors in the enclosure. The SEP makes
adjustments to the fan speeds based upon the thermal sensors. The fan algorithm takes into account the
component and the warning and critical threshold limits defaulted and managed by the SEP controller. If
any temperature sensor exceeds the temperature threshold configured in the SES pages, the fan speed
will increase to cool the enclosure. If the enclosure encounters low temperatures, the enclosure will reduce
fan speed in an attempt to conserve power and not over-cool the enclosure. This algorithm is agnostic
to effects of altitude and humidity. The algorithm works based on temperatures within the enclosure with
emphasis on reducing power consumption.
The rack that the Ultrastar Data102 is installed in must not restrict airflow to the enclosure. Racks with doors
should be tested to ensure they do not constrict airflow to the enclosure. If the enclosure reaches critical
temperature, it will go into low-power mode to avoid damage to the enclosure.
When the Ultrastar Data102 is extended out of the rack, the cover of the enclosure remains inside the
rack which exposes the drives. This feature allows for easier access to drives and simplifies maintenance
tasks related to internal components. However, there is a limit to the amount of time the enclosure can be
extended out of the rack before the enclosure will begin to overheat.
Power
Typical Power Consumption: ~1300W
200-240 VAC, auto-ranging, 50/60 Hz
AC line inrush current shall not exceed 40A
supply)
peak, for up to one-quarter of the AC cycle
after which, the input current should be no
more than the specified maximum input current.
1. Overview
1.14 ESD
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