IBM TotalStorage FAStT700, User Manual

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5. Using Figure 34 as a guide, check the controller indicator lights.
FAStT700
Power
Power supply
Controller fan
Controller
Fast write cache
v
If the green power indicator is on and the amber fault indicator is off, go to
Step 8.
v
If the green power indicator remains off or the fault indicator is on after a few
seconds, make sure that the controller CRU is locked into place. If the fault
indicator remains on, go to Step 6.
6. Use the storage-management software to check the status of both controllers. If
applicable, perform the recovery procedures required by the software. If this
corrects the fault and the FAStT700 Storage Server is operating without error,
go to Step 8. If not, go to Step 7.
7. Reinsert the controller CRU. Then, if there are no error messages or controller
faults, go to Step 8 If there is still a problem, call for service.
8. Replace the FAStT700 Storage Server bezel, as shown in Figure 21 on
page 17.
Battery
The battery CRU contains rechargeable batteries and a battery-charger board. The
battery CRU plugs into the front of the FAStT700 Storage Server (see Figure 35 on
page 41) where it provides backup power to the cache memory in both controllers.
During a power outage, a properly charged battery CRU maintains electrical current
to the controllers for up to five days with 1 Gb cache memory installed. All data
stored in memory is preserved as long as the batteries can sustain power to the
cache memory. However, the battery does not provide power to the rest of the
system during a power outage. Therefore, the system is not able to write data to
hard disk drives without a backup power source.
Servicing notes
Consider the following when servicing the battery in the FAStT700 Storage Server:
v
The battery has a three-year life expectancy. Replace the battery every three
years or whenever it fails to hold a charge. Operating the FAStT700 Storage
Server in an unsupported environment (above 35° C or 95° F) lowers the life
expectancy of the battery.
v
The service label on the battery provides a blank line for recording the date on
which the battery was last serviced (see Figure 36 on page 42). Check this label
to determine when to replace the battery. For information about using the
software to track battery age, refer to the IBM FAStT Storage Manager
documentation and online help.
v
When a battery fails, the fault light on the battery is lit. For more information
about indicator lights, see “Battery indicator lights” on page 25.
Figure 34. Indicator lights on the FAStT700 Storage Server bezel
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FAStT700 Fibre Channel Storage Server: User’s Guide