Dot Hill Systems II 200 FC - Manual (Page 113)

Chapter 7 Maintaining Your Array 7-5
Your lithium ion battery should be changed every two years if the unit is continuously
operated at 77
° F (25° C). If the unit is continuously operated at 95° F (35° C) or higher,
the battery should be changed every year. The shelf life of your battery is three years.
Note –
The RAID controller has a temperature sensor which shuts off battery charging
when the temperature reaches 129 ° F (54° C). When this happens, the battery status
might be reported as BAD, but no alarm is written to the event log because no actual
battery failure has occurred. This behavior is normal. As soon as the temperature
returns to the normal range, battery charging resumes and the battery status is reported
correctly. It is not necessary to replace or otherwise interfere with the battery in this
situation.
For more information, see “Environmental Requirements” on page 2-3 for the
acceptable operating and nonoperating temperature ranges.
For information about the date of manufacture and how to replace the battery module,
refer to the SANnet II Family FRU Installation Guide.
7.3 Viewing Event Logs on the Screen
A controller event log records events and alarms that occur after the system is powered
on. The controller can store up to 1000 event log entries. The event log records
configuration and operation events as well as error messages and alarm events.
Note – The SES logic in each array sends messages to the event log, which report
problems and the status of the fans, temperatures, and voltages.
Caution –
Powering off or resetting the controller automatically deletes all recorded
event log entries.