9.4 Batteries
The RamSan-325 is equipped with three redundant 30-minute sealed lead acid batteries. The batteries are designed to protect the data in DDR RAM memory. If the RamSan-325 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 12 minutes for a fully loaded system as the system synchronizes data on the disks.
Later models of the RamSan-325 perform a periodic battery test to ensure the internal batteries are healthy. Twelve hours after powering the system on, it runs a test that exercises the batteries to ensure they are present and able to hold charge. There is no risk for data loss during this test because the power supplies back up the batteries. The system repeats the test every 30 days after the first test. If the system powers off, the test cycle starts over. The RamSan reports periodic battery test failures in the System Event Log and in all of the management utilities, including the front panel display. If a failure occurs, contact Texas Memory Systems for a replacement battery immediately.
Important:
The periodic battery test does not guarantee that your batteries will have enough capacity to back up in all cases. Texas Memory Systems recommends replacing your batteries every two years, even if they continue to pass the periodic battery test.
9.5 Fans
The system has one block of 12 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-325/325c User’s Manual | - 101 - |
