- https://www.dell.com/support/article/en-us/sln292269/chassis-status-indicators-and-hard-drive-carrier-leds-for-servers-storage-and-precision-rack-workstations?lang=en - ### 1 - Hard Drive Carrier Status LEDs - The LEDs on the physical disk carrier indicates the state of each physical disk. Each drive carrier in your enclosure has two LEDs: an activity LED (green) and a status LED (bicolor, green/amber) as shown below. The activity LED flashes whenever the drive is accessed. - Off - Slot is empty, drive is not yet discovered by the system. - Steady green - Drive is online. - Green flashing (250 milliseconds [ms]) - Drive is being identified or is being prepared for removal. - Green flashing (On 400 ms, Off 100 ms) - Drive is rebuilding or undergoing a Replace Member operation. - Amber flashing (125 ms) - Drive has failed. - Green/amber flashing (Green On 500 ms / Amber On 500 ms, Off 1000 ms) - Predicted failure reported by drive. - Green flashing (Green On 3000 ms, Off 3000 ms, Amber On 3000 ms, Off 3000 ms) - Drive being spun down by user request or other non-failure condition.