Technical Support | 67Locating E300 Serial NumbersCurrently, in nearly all cases, the serial number has a two-letter preamble followed by nine digits, and isdisplayed both in text and below an equivalent bar code, usually on the component’s faceplate.Chassis: The serial number of the chassis is located on a sticker on the back of the chassis at the bottomcenter to the right of a part number sticker. You can also use the show chassis command in FTOS todisplay the serial number.2 Request a Return Materials Authorization (RMA) number from TAC by opening a support case. Open a support caseby:• Using the Create Service Request form on the iSupport page (see Contacting the Technical Assistance Center onpage 66).• Contacting Dell Force10 directly by E-mail or by phone (see Contacting the Technical Assistance Center onpage 66).3 Provide the following information when using E-mail or phone:• Part number, description, and serial number of the component.• Your name, organization name, telephone number, fax number, and e-mail address.• Shipping address for the replacement component, including a contact name, phone number, and e-mail address.• A description of the failure, including log messages. This generally includes:• the show tech command output• the show trace and show trace hardware command output• for line card issues, the show trace hardware linecard command output• console captures showing any error messages• console captures showing the troubleshooting steps taken• saved messages to a syslog server, if one is usedThe support representative will validate your request and issue an RMA number for the return of the component.4 Pack the component for shipment, preferably using the original shipping container materials. Label the package withthe component RMA number. For details on removing and replacing components, see Removing and ReplacingComponents on page 45.Step Task