Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 231)

Battery Backup page
www.lsi.com/channel/products 219
about once a week to top off the charge level; the process does not change
the BBU readiness state.
If the battery is ever discharged through a backup cycle or if the system
power is off for more than two weeks, the battery status changes to
“Charging” the next time the system is powered on. This indicates the
BBU is not able to backup the 3ware RAID controller. When the BBU is
in the charging state, write caching is disabled automatically on all units
attached to the controller.
• Fault . The BBU detected a fault. This occurs if the voltage or temperature
is outside the acceptable range.
• Error . Other BBU error. Please contact LSI Technical Support.
• Weak Battery . The battery should be replaced soon. The results of a
battery health test or capacity test indicate that the battery is below the
warning threshold (48 hours).
• Failed Battery . The battery failed a test and must be replaced. A “Failed
Battery” status is displayed if the battery failed the health test or the
battery capacity is below the error threshold (24 hours). The battery must
be replaced.
Battery Voltage. Indicates the voltage status of the battery. The BBU
measures and evaluates the battery voltage continuously. If the voltage falls
outside the normal range, warning or error level AENs are generated. In the
case of a voltage error the BBU status will change to “Fault” and the battery
will be disconnected electronically.
Battery Temperature . Indicates the temperature status of the battery. The
BBU measures and evaluates the battery pack temperature continuously. If the
temperature falls outside the normal range, warning or error level AENs are
generated based on the measured temperature. In the case of a temperature
error, the BBU status will change to “Fault” and the battery will be
disconnected electronically.
Estimated Backup Capacity. Indicates the estimated backup capacity in
hours. This is the amount of time that the battery backup unit can protect the
data in the 3ware RAID controller's cache memory. This field is set to zero at
the start of a new test and is updated after the test completes. A capacity of
zero will also show if the BBU is disconnected and then reconnected.
Under optimal conditions, a battery can protect for up to 72 hours. However,
with a fresh battery, you may see a higher number in this field. As the battery
ages, the backup capacity diminishes.
Last Capacity Test. Indicates the date when the last battery test was
completed. To test the battery click the Test Battery Capacity link. For
details, see “Testing Battery Capacity” on page 176.
Battery Installation Date. Indicates when the BBU last detected the battery
pack was removed and replaced.