Dell POWEREDGE 1855 - Manual (Page 64)

3. Remove the system battery by lifting it straight up from its connector. See Figure 6 -20 .
See Figure A -3 to locate the system battery on the server module board.
4. Install the new system battery with the side labeled "+" facing toward the inside of the server module. See Figure 6 -20 .
Figure 6-20. Replacing the System Battery
5. Close the server module. See " Closing the Server Module ."
6. Install the server module. See " Installing a Server Module ."
7. Enter the System Setup program to confirm that the battery is operating properly. See "Using the System Setup Program" in your User's Guide.
8. Enter the correct time and date in the System Setup program's Time and Date fields.
9. Exit the System Setup program.
10. To test the newly installed battery, remove the server module for at least an hour. See " Removing a Server Module ."
11. After an hour, install the server module. See " Installing a Server Module ."
12. Enter the System Setup program and if the time and date are still incorrect, see " Getting Help " for instructions about obtaining technical assistance.
Hard Drives
Your server module includes up to two hot-pluggable hard drives. The hard drive bays are located on the front panel of the server module. Each hard drive has
indicators that provide hard drive activity and status information.
Integrated Mirroring of SCSI Hard Drives
The SCSI controller on the server module board supports integrated mirroring if two SCSI drives are installed. After installing the drives, see your Configuration
Guide to enable and configure your RAID array.
Installing a Previously Arrayed Hard Drive Into a SCSI-Mode Server Module
A hard drive previously installed in a RAID configuration contains partial segments of information referred to as "meta-data." If you hot-install a hard drive that
contains meta-data into a SCSI-mode server module, its array may appear as degraded after the server module is rebooted.
To remove the meta-data from the replacement hard drive, perform the following steps:
1. Back up all data onto the replacement hard drive.
2. Restart the server module and press <Ctrl><m>.
3. Change the degraded array properties from mirror to SCSI mode by selecting NO as the Mirror option.
CAUTION: Do not attempt to rebuild the degraded array in a SCSI-mode server module. The server module can accommodate up to two hard
drives, one of which is the primary physical boot hard drive. Rebuilding the array could result in loss of data from the primary hard drive.