Ds4300 Storage Subsystem Battery Led - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

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 failed.
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.
Figure 77 shows the location of the Battery LED on the RAID controller modules
which are located on the back of the DS4300 subsystem.
Battery
LED
Figure 77. DS4300 storage subsystem battery LED
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Chapter 4. Operating the storage subsystem