Hard Disk and Optical Drive
Because of the boredom during the trip it is possible to start hard disk sorting (removing a big amount of files from one directory to another).
The time of the unmanaged mode of the mobile computer when HDD is maximum loaded
The time of the unmanaged mode will reduce at 20-25 %, but for this you should to copy files between logical disks during 2-3 hours.
The time of the unmanaged mode of the mobile computer when read and save data on DVD
Reading and Saving on DVD will demand more energy than during the same operations with hard disk. Notice, that saving expends a little more time than reading.
The time of the unmanaged mode of the mobile computer when read and save data on CD
More interesting results were for CD. More data flow DVD comes from DVD, more loaded RAM and Hard disk. But operating with CD needs more energy! And reading consumes it more than saving! Why? We suppose it occurs because of speed rotation of the disk. The drive speeds quicker during the operation with CD than with DVD especially when reading. So it is more saving and effective to use DVD. It'll be interesting to know results for Blue-ray. But it is difficult to do because of low popularity of this format.