Disk Drive Maintenance; Battery; Fans - Texas Memory Systems RamSan-120 User Manual

9.3 Disk Drive Maintenance

The RamSan's internal disk drive is equipped with industry standard Self-
Monitoring, Analysis and Reporting Technology (SMART). The RamSan
uses SMART to track vital hard drive performance statistics, which helps it
to diagnose imminent disk failures. The RamSan system monitoring
software queries the disk periodically about its SMART status. If SMART
indicates an imminent disk failure, the system monitoring software will
display a warning message in the system log.

9.4 Battery

The RamSan-120 is equipped with a seven-minute Lead Acid battery. The
battery protects the data in SDRAM memory. If the RamSan-120 looses
external power, the system continues to function by running on the
internal battery. Even if the power supply is removed or fails, the battery
will continue to operate.
After power fails, the system remains in an active state for up to one
minute. If power is restored within this time, the system will remain
online.
If the battery is not fully charged, the system may initiate a shutdown
before the one-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 five minutes for a fully loaded
system as the system synchronizes data on the disk.
The RamSan-120 performs a periodic battery test to ensure the internal
battery is healthy. Twelve hours after powering the system on, it runs a
test to exercise the battery. This ensures that the battery is present and
able to hold charge. There is no risk for data loss during this test because
the power supply backs up the battery. 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 battery will have
enough capacity to back up in all cases. Texas Memory Systems
recommends replacing your battery every two years, even if it continues
to pass the periodic battery test.

9.5 Fans

The system has one block of six fans. The fan block is accessed from the
top of the chassis.
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