LED IDE Disk Trigger

modulename: ledtrig-ide-disk.ko

configname: CONFIG_LEDS_TRIGGER_IDE_DISK

Linux Kernel Configuration
└─>Device Drivers
└─>LED Support
└─>LED Trigger support
└─>LED IDE Disk Trigger
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This allows LEDs to be controlled by IDE disk activity.
If unsure, say Y.

source code: