3 System upgrades32Determining the drive statusEach HDD carrier features two status LED indicators (see page 6) todisplay the hard drive status. If you are replacing a failed HDD, determinewhich drive has failed by checking the hot-plug HDD status indicators.3.5-inch HDD2.5-inch HDD1 * The state depends on HDD typeDescriptionGreen RedOnboard SATA or RAID card without SGPIO supportHDD present On/Off* OffHDD access Blink OffRAID card with SGPIO supportHDD present no access On/Off*HDD access BlinkHDD failure OnHDD removal Off OffHDD insertion and rebuilding Blink (1 Hz)HDD locate Blink (4 Hz)