Troubleshooting 53Hard-Drive Not Recognized1 Open the sled. See "Opening the Sled" on page 26.2 Check the power and mini-SAS data cable connection. Ensure that thecables are firmly seated in their connectors on the hard-drive backplaneand the SAS expander board. Or, check the connector pins for damage.3 Check the status LED indicators and ensure all the hard-drives areilluminated. For the locations and description of LED indicators, see"Hard-Drive Indicator Patterns" on page 10.4 If the hard-drive indicator is off, remove the hard-drive. See "Removing aStandard Hard-Drive Carrier" on page 31, "Removing a Flexible Hard-Drive Carrier" on page 35, or "Removing an Expansion Hard-Drive Carrier"on page 39.5 Check the hard-drive and ensure that the connectors are not damaged.6 Reinstall the hard-drive. See "Installing a Standard Hard-Drive Carrier" onpage 32, "Installing a Flexible Hard-Drive Carrier" on page 37, or"Installing an Expansion Hard-Drive Carrier" on page 41.7 Close the sled. See "Closing the Sled" on page 26.8 If the problem persists, install a new hard-drive.Hard-Drive Indicator Does Not Light1 Open the sled. See "Opening the Sled" on page 26.NOTE: You must ensure that you check the hard-drive indicators before removingthe faulty hard-drive from the sled.2 Locate the faulty hard-drive. Each hard-drive has indicators that identify afaulty hard-drive. For the locations and description of LED indicators,see "Hard-Drive Indicator Patterns" on page 10.3 If the hard-drive indicator is off, remove the hard-drive. See "Removing aStandard Hard-Drive Carrier" on page 31, "Removing a Flexible Hard-Drive Carrier" on page 35, or "Removing an Expansion Hard-Drive Carrier"on page 39.4 Check the hard-drive and ensure that the connectors are not damaged.5 Reinstall the hard-drive. See "Installing a Standard Hard-Drive Carrier" onpage 32, "Installing a Flexible Hard-Drive Carrier" on page 37, or"Installing an Expansion Hard-Drive Carrier" on page 41.