Dell Precision 690 - Manual (Page 56)

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 .
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.
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.
1 power cable
2 data cable
3 SAS/SATA HDD connector
1 power cable
2 data cable
3 SAS interposer connector
4 SAS/SATA HDD connector