Dell PowerEdge T300 Series Hardware Owner's Manual page 79

NOTICE:
Combining SATA and SAS hard drives in the same system configuration is
not supported.
1 Unpack the hard drive and prepare it for installation.
2 Remove the front bezel (see "Removing the Front Bezel" on page 63).
3 Remove either the existing hard drive, if applicable, or the hard drive
carrier (see "Diskette Drive (Optional)" on page 84).
4 Install the hard drive carrier on the hard drive.
Insert the hard drive into the hard-drive carrier with the connector
a
end of the drive at the rear. See Figure 3-12.
Viewing the assembly as shown in Figure 3-12, align the screw holes
b
on the hard drive with the rear set of holes labeled "SAS" on the hard
drive carrier.
When aligned correctly, the rear of the hard drive will be flush with
the rear of the hard-drive carrier.
Attach the four screws to secure the hard drive to the hard-drive
c
carrier. See Figure 3-12.
Installing System Components
79