IBM FAStT200 HA, Инструкция по установке и эксплуатации

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Chapter 4. Operating the storage server
35
RAID controller cache battery
Each RAID controller contains a sealed, rechargeable 4-volt lead-acid battery. This
battery provides cache backup for up to three days in the event of a power loss.
The service life of the battery is three years, after which time the battery must be
replaced. Refer to the storage-management software for information on how to view
and set the battery expiration date.
Each RAID controller has a green Battery LED on the back that indicates the battery
status, as follows:
• The LED is on and remains steady when the battery is fully charged.
• The LED flashes when the battery is charging or performing a self-test.
• The LED is off if the battery or the battery charger has 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.
The following illustration shows the location of the Battery LED on the front of the
RAID controller.
Battery LED