Dell 810 Owner's Manual page 175

Depending on the results of the diagnostics test, proceed as needed
through the following steps.
2 If applicable, remove the bezel. See "Removing the Front Bezel" on
page 83.
3 If your system has a RAID controller and your hard drives are configured in
a RAID array, perform the following steps:
Restart the system and enter the host adapter configuration utility
a
program by pressing <Ctrl><R> for a PERC controller or
<Ctrl><C> for a SAS controller.
See the documentation supplied with the host adapter for information
about the configuration utility.
Ensure that the hard drive(s) have been configured correctly for the
b
RAID array.
Take the hard drive offline and reseat the drive. See "Removing a
c
Hard-Drive Carrier" on page 87.
Exit the configuration utility and allow the system to boot to the
d
operating system.
4 Ensure that the required device drivers for your controller card are installed
and are configured correctly. See the operating system documentation for
more information.
5 Restart the system, enter the System Setup program, and verify that the
controller is enabled and the drives appear in the System Setup program.
See "Using the System Setup Program and UEFI Boot Manager" on
page 59.
If the problem persists, see "Troubleshooting a Storage Controller" on
page 176.
Troubleshooting Your System
175