You receive an error while trying to turn on turn on the disk LED using the ESX command line interface:
#esxcli storage core device set -d naa.xxx --led-state errorUnable to set LED state for device naa.xxx: Not supported!
The ERROR LED operation is not supported for lsuv2-lsiv2-drivers-plugin
esxcli storage core device set -d naa.xxx --led-state locator --led-duration 100