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8.4 Batteries
The RamSan-320 is equipped with three redundant 30-minute Lithium Ion
batteries. The batteries are designed to protect the data in SDRAM
memory. If the RamSan-320 looses external power, the system continues
to function by running on the internal batteries. Even if both power
supplies are removed or fail, the batteries will continue to operate.
After power fails, the system remains in an active state for up to five
minutes. If power is restored within this time, the system will remain
online.
If the batteries are not fully charged, the system may initiate a shutdown
before the five-minute window has elapsed. This procedure protects the
data in memory by storing it to disk. If running in DataSync mode, the
shutdown operation takes approximately one minute for every four
Gigabytes of capacity as the system synchronizes data on the disks.
8.5 Fans
The system has one block of ten fans. The fan block is accessed from the
top of the chassis. Each airflow channel has redundant fans so that
cooling is sufficient as long as one of the two fans is running. If one fan
fails, the system will issue a warning. If both fans in a single channel fail,
the system will issue an error.
RamSan-300/320 User’s Manual - 86 -