1.If you are replacing a hard drive that contains data that you want to keep, back up your files before you begin this procedure.

2.Follow the procedures in Before You Begin.

CAUTION: Your computer is heavy (it has an approximate minimum weight of 55 lbs) and can be difficult to maneuver. Seek assistance before attempting to lift, move, or tilt it; this computer requires a two-man lift. Always lift correctly to avoid injury; avoid bending over while lifting. See your Product Information Guide for other important safety information.

CAUTION: The computer stand should be installed at all times to ensure maximum system stability. Failure to install the stand could result in the computer tipping over, potentially resulting in bodily injury or damage to the computer.

3.Remove the computer cover (see Removing the Computer Cover).

4.Disconnect the power cable from the hard drive and from the power connector on the system board.

5.Disconnect the data cable from the hard drive.

6.If you are using a SAS controller card, ensure that the data cable is held by cable clips, if available on your system, where it will not be pinched or crimped.

Otherwise, remove the other end of the data cable from the system board.

1power cable

2data cable

3SAS/SATA HDD connector

1power cable

2data cable

3SAS interposer connector

4SAS/SATA HDD connector

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Dell 690 manual