EMC CLARiiON CX700, Справочник по аппаратуре

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A-12
CX700 Hardware Reference
Technical Specifications and Operating Limits
in write-through mode while the power remains in input low range. This
operating mode is intended to detect a slowly decaying battery bus and
allows the enclosure to prepare for a possible shutdown, should input
power be lost on both inputs. Write caching will automatically be
re-enabled once both supplies return to the normal operational range.
2 Power supplies in the overvoltage range will continue to operate with no
change in system behavior. Excessive overvoltage conditions may damage
the unit and create a power supply fault for that supply. If the system
recognizes a power supply fault condition, it disables write caching, clears
the write cache, and operates in data write-through mode until the supply
is replaced.
3 If both power supplies transition from the normal operational range to the
off range in less than 90 seconds, write-cache memory may lose data and
compromise the data in the storage system. Always disable write cache
before removing power from both input buss