Dell PowerVault 735N (Rackmount NAS Appliance) User Manual
Page 70
Removing and Replacing Parts: Dell PowerVault 735N Systems Service Manual
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The system battery maintains system configuration, date, and time information in a special section of memory when you turn off the system.
The operating life of the battery ranges from 2 to 5 years, depending on how you use the system (for example, if you keep the system on most
of the time, the battery gets little use and thus lasts longer). You may need to replace the battery if an incorrect time or date is displayed
during the boot routine along with the following or similar message:
Time-of-day not set -- please run SETUP program
Strike the F1 key to continue, F2 to run the setup utility
or
System CMOS checksum bad -- Run SETUP
Strike the F1 key to continue, F2 to run the setup utility
or
Invalid configuration information -- please run SETUP program
Strike the F1 key to continue, F2 to run the setup utility
To determine if the battery needs replacing, re-enter the time and date through the
. Turn off the system for a few
hours, and then turn it on again. Enter the System Setup program. If the date and time are not correct in the System Setup program, replace
the battery.
NOTES: Some software may cause the system time to speed up or slow down. If the system seems to operate normally except for the
time kept in the System Setup program, the problem may be caused by software rather than by a defective battery.
If the system is turned off for long periods of time (for weeks or months), the NVRAM may lose its system configuration information.
This situation is not caused by a defective battery.
You can operate the system without a battery; however, the system configuration information maintained by the battery in NVRAM is erased
each time you shut down the system. Therefore, you must reenter the system configuration information and reset the options each time the
system initializes until you replace the battery.
The battery is a 3.0-volt (V), coin-cell CR2032-type battery. To remove the battery, perform the following steps.
CAUTION: There is a danger of a new battery exploding if it is incorrectly installed. Replace the battery only with the same or
equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions.
1. Enter the System Setup program and, if possible, make a printed copy of the System Setup screens.
See "
Using the System Setup Program
" in the User's Guide for instructions.
2. Shut down the system, including any attached peripherals, and disconnect the system from the electrical outlet.
NOTICE: See "
Protecting Against Electrostatic Discharge
" for information on protecting the system from electrostatic discharge.
3. Open the
.
4. If necessary, remove the
to gain access to the battery.
5. Remove the battery from its socket using your fingers or a blunt, nonconductive object such as a plastic screwdriver.
6. Install the new battery with the side labeled "+" facing up (see
).
Figure 31. Battery Replacement