Dell PowerEdge 750 - Manual (Page 63)

The interface cables for SATA hard drives are connected to the system board. See Figure A -3 for the location of the system board connectors.
The interface cables for SCSI hard drives are connected to a controller card.
4. Loosen the captive screw that secures the hard-drive carrier to the chassis. See Figure 7 -3 .
Figure 7-3. Removing the Hard-Drive Carrier
5. Slide the hard-drive carrier backward and lift the carrier out of the chassis.
6. Using a #2 Phillips screwdriver, remove the four screws that secure the hard drive to the carrier and remove the drive from the carrier. See Figure 7 -4 .
Figure 7-4. Removing the Hard Drive From the Drive Carrier
Installing a Hard Drive
1. Align the hard-drive mounting holes with the holes in the drive carrier.
2. Using a #2 Phillips screwdriver, install the four screws that secure the hard drive to the carrier. See Figure 7 -4 .
3. Align the hard-drive carrier so that the tabs on the chassis slide into the notches in the carrier. See Figure 7 -3 .
4. Slide the carrier forward until it stops.
5. Tighten the captive screw that secures the hard-drive carrier to the chassis.
6. Connect the power and interface cables to the new drive.
The interface cables for SATA hard drives are connected to the system board. See Figure A -3 for the location of the system board connectors.
The interface cables for SCSI hard drives are connected to a controller card.
7. Install the CD drive or optional diskette drive.