Dell POWEREDGE R805 - Manual (Page 33)

RAID Battery
The information in this section applies only to systems with the optional battery-cached SAS controller daughter card.
Installing a RAID Battery
1. Insert the RAID battery into the battery carrier. See Figure 3 -12 .
2. Locate the battery bay to the right of the SAS daughter card on top of the hard drive bays.
3. Insert the battery carrier and RAID battery into the system's battery carrier slots and connect the battery cable to the storage daughter card, ensuring
that the battery carrier is aligned and fully seated in the slots.
Removing a RAID Battery
1. Disconnect the cable between the RAID battery and the SAS controller daughter card. See Figure 3 -12 .
2. Press down and to the left on the battery carrier to disengage the carrier from the chassis battery carrier slots.
3. Pull back gently on the two guides holding the RAID battery in the battery carrier and draw out the RAID battery from the battery carrier.
Figure 3-12. Installing a RAID Battery
Configuring the Boot Device
If you plan to boot the system from a hard drive, the drive must be attached to the primary (or boot) controller. The device that the system boots from is
determined by the boot order specified in the System Setup program.
The System Setup program provides options that the system uses to scan for installed boot devices. See Using the System Setup Program for information
about the System Setup program.
Internal USB Memory Key Connector
The system provides an internal USB connector located on the expansion-card riser 2 board for use with a USB flash memory key (see Figure 6 -4 ). The USB
memory key can be used as a boot device, security key, or mass storage device. To use the internal USB connector, the Internal USB Port option must be
enabled in the Integrated Devices screen of the System Setup program.
To boot from the USB memory key, you must configure the USB memory key with a boot image and then specify the USB memory key in the boot sequence in
the System Setup program. See
System Setup Options . For information on creating a bootable file on the USB memory key, see the user documentation that
accompanied the USB memory key.
1 RAID battery connector (RAID_BATT) 2 battery carrier
3 RAID battery 4 chassis battery carrier slot (2)
NOTE: System boot is not supported from an external device attached to a SAS or SCSI adapter. See support.dell.com for the latest support
information about booting from external devices.