Battery Leds - IBM DS4800 User, Installation And Maintenance Manual

Replace only the battery pack that is indicated as failed by the LEDs or in the
DS4000 Storage Manager Subsystem Management window. You do not need to
replace both battery packs when the Battery LEDs indicate that only one battery
pack has failed.
In the event that the battery age expires, do not call on IBM technical support to
replace the battery. Instead, reset the battery age using the procedure described in
the Storage Manager online help. You should only replace the battery when it is in a
failed state, as reported by the Storage Manager Recovery Guru.
Note: Controller firmware version 6.14.xx.xx does not provide the Storage Manager
menu option to reset the battery age. This option is available with controller
firmware version 6.15.xx.xx or later.
Each power supply-fan unit has green Battery LEDs on the back that indicates the
battery status of each battery pack, as follows:
v The LED is on and remains steady when the battery is fully charged.
v The LED flashes when the battery is charging or performing a self-test.
v The LED is off if the battery or the battery charger has failed.
The interconnect-battery unit also has a battery failure indicator LED for each
battery pack that is located on the interconnect-battery unit. This LED will light if the
battery fails to hold a charge.
The battery performs a self-test at startup and every 25 hours thereafter (during
which time the Battery LED flashes). If necessary, the battery begins recharging at
that time. If the battery fails the self-test, the Battery LED turns off, indicating a
battery fault.
Data caching starts after the battery completes the startup tests.
Attention: Write caching is suspended while a battery pack is either charging or
self-testing.
Figure 81 shows the location of the Battery LEDs and the Battery Needs Attention
LEDs on the power-supply-fan units and the interconnect-battery unit.
Battery Needs Attention LED
Battery 1 LED
Battery 2 LED
Figure 81. Battery LEDs
Battery Needs Attention LED
Battery 1 LED
Battery 2 LED
Chapter 4. Operating the storage subsystem
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