Before you begin

Before you begin to install options in your computer, read the following information:

• Become familiar with the safety and handling guidelines specified under “Handling electrostatic discharge-sensitive devices” on page 96 of the Hardware Maintenance Manual, and read the safety statements in “Safety information” on page 93 of the Hardware Maintenance Manual. These guidelines will help you work safely with your computer or options.
• Make sure that you have an adequate number of properly grounded electrical outlets for your computer, monitor, and any other options that you intend to install.
• Back up all important data before you make changes to hard disk drives.
• Have a small, flat-blade screwdriver available.
• For a list of supported options for your computer, refer to http://www.ibm.com/pc/support on the World Wide Web.

System reliability considerations
To help ensure proper cooling and system reliability, make sure:

• Each of the drive bays either has a drive, or a filler panel and electromagnetic compatibility (EMC) shield installed.
• There is space around the computer to allow the computer cooling system to work properly. Leave about 127 mm (5 in.) of space around the front and rear of the computer.
• Cables for optional adapters are routed according to the instructions that are provided with the adapters.
• A failed fan is replaced within 1 hour.