Dot Hill Systems SANnet II 200, Installation, Operation And Service Manual

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6-4 SANnet II 200 SCSI Array Installation, Operation, and Service Manual • June 2005
A battery module whose status shows one or more + signs can support cache memory
for 72 hours. As long as one or more + signs are displayed, your battery is performing
correctly.
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,
it should be changed every year. The shelf life of your battery is three years.
Note –
The RAID controller has a temperature sensor that shuts off battery charging
above 129.2
°
F (54
°
C). When this happens, the battery status might be reported as
BAD, but no alarm is written to the event log since 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 interfere with the battery in this situation.
For information on the date of manufacture and how to replace the battery module,
refer to the
SANnet II Family FRU Installation Guide . For more information about the
acceptable operating and non-operating temperature ranges for your array, see
“Environmental Requirements” on page 2-3.
6.4 Silencing Audible Alarms
An audible alarm indicates that either a component in the array has failed or a specific
controller event has occurred. Error conditions and controller events are reported by
event messages and event logs. Component failures are also indicated by LED activity
on the array.
Table 6-1 Battery Status Indicators
Battery
Display
Description
----- Discharged; the battery is automatically recharged when it reaches this
state.
+---- Adequately charged to maintain cache memory for 72 hours or more in
case of power loss. Automatic recharging occurs when the battery
status drops below this level.
++--- Over 90% charged; adequate to maintain cache memory for 72 hours
or more in case of power loss.
+++-- Over 90% charged; adequate to maintain cache memory for 72 hours
or more in case of power loss.
++++- Over 90% charged; adequate to maintain cache memory for 72 hours
or more in case of power loss.
+++++ Fully charged; adequate to maintain cache memory for 72 hours or
more in case of power loss.