HGST ULTRASTAR SERV24, Руководство пользователя

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Appendix
B
B System Operations Appendices
B.1 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.
B.2 System Cooling
The Ultrastar Serv24 has a thermal solution that is designed to maintain normal system operation during the
servicing of the enclosure. During a PSU replacement, the enclosure can function normally without affecting
airflow and cooling. During a fan replacement, it is important to limit the time the enclosure cover is removed
to 10 minutes. The removal of the enclosure cover compromises the proper airflow and cooling of the functioning
enclosure.
The Ultrastar Serv24 has a safety feature called the over temperature protection (OTP) mechanism that uses
sensors to monitor extreme temperature overages to ensure the system does not overheat. In the case of
unsafe temperature increases, the OTP mechanism will be activated to protect the enclosure and all of its
components. In the case of a warning sensor threshold violation, the OTP mechanism will report the warning
information to the user through system management protocols. If the critical sensor threshold is exceeded,
the CPUs and memory will be throttled to prevent temperature increases. If the shutdown threshold is exceeded,
the baseboard management controller (BMC) will shut down the enclosure to prevent permanent system and
component damage.
The enclosure contains six fan modules located near the front of the enclosure behind the drives. The fans
provide proper cooling and airflow throughout the enclosure by pulling cool air in through the front bezel and
distributed to the other components via the air ducts. Proper airflow ensures the that components remain at
a safe operating temperature through normal operating conditions. The fans are designed to be redundant in
case of a failure to ensure that the system will remain at the proper temperature until the failed fan can be
serviced.
B.3 Power Requirements
The following table describes the A/C input power specification for the Ultrastar Serv24.
Table 41: AC Power Specifications
Power
Alternating Current (AC) Power Supply (2 per enclosure)
1200W 80 Plus
™
Platinum
Wattage (per power supply)
• Low line: 100-127VAC (low line) (1000W max),
auto-ranging, 47/63 Hz Voltage (per power supply)
• High line: 200-240VAC (high line) (1200W max),
auto-ranging, 47/63 Hz
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B System Operations Appendices
User Guide B.1 ESD