What do the front panel LED light colors indicate?

The left light pipe is green when the STB is awake, orange when the STB is in Network Standby, and off when the STB is in deep standby; it will blink green if any RCU key is pressed. The right light pipe blinks blue when a software upgrade is ongoing, is red when a recording is in progress, and is white when the rackable HDD is mounted and ready for use. (Page 8)