Lenovo IdeaPad U110 - Manual (Page 29)

Chapter 2. Using Your Computer
18
System status indicators - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
The system status indicators show the current status of your computer.
Your computer has system status indicators as follows:
Drive in use
Blue/Flashing Blue:Data is being read from or written to the hard disk
or optical disc drive. When this indicator is on, do
not put the computer into sleep mode or turn off
the computer.