Disc defragmenter? help?

yesterday when i defragmented the disc it stated i had 34% free space on the local disc C. Today it stated i had 9% free space on the C drive, Ive managed to get it up to 42% free space now but how do i get it to check the CD ROM drive (E)? as when i went into 'my computer' and looked in disc drive E properties it states there was no space available, same with the DVD rom drive. How do i change the local disc (C) so (E) %26amp; (D) drives can get defragged aswell,,,,ive deleted most of the programms that i dont use and emptied the trash to see if this will help but to no avail also what is the local disc? is it the floppy? as ive never inserted a floppy disc,,,,,,would it be possisble if you can explain it in non pc gargon if you have any idea to help me

Disc defragmenter? help?
It might help to explain the process of defragmenting. When your computer is new files are saved whole and your free space is one contiguous area. As files are saved, deleted, saved again, and so on, the free space on your hard drive becomes divided into little chunks. When new files are saved into those chunks they must be divided and saved as several smaller pieces and then reassembled when accessed. Obviously when your computer has to grab several pieces of a file from different places and reassemble it, that is slower.





Defragmenting rearranges the files on your hard drive so that they are saved whole and in one place. It also makes your free space into a single continous area.





Data on a CD or DVD is permanent, that is to say you cannot move or delete it. Therefore you cannot defragment them. In fact you don't need to for the same reasons.
Reply:It is not possible to defragment a CD-ROM or DVD-ROM, and it isn't necessary either, defragmenting is used on disk that is often written and deleted, in which these operations makes the disk "fragmented", only Harddisk that should be defragmented, you can defrag Floppy, but it makes lots of read and write, and that makes the life span of the floppy (which is already short) shorter.





Local disk means every permanent storage device that is installed in your PC, like harddisks.





CD, DVD, and Floppy are NOT local disk





btw, how could it possible in one day, your harddisk lost 25% of it's free space? And how many junk files have you deleted that freed your space as much as 33%?
Reply:You can not defragment a CD ROM drive (E drive). ROM means Read only Memory thus you can not change the structure of this disk. D drive is probably a partition that is used for data recovery in case you have problems. It should not need defragmenting either.
Reply:You can't defrag your cd rom drive or dvd rom drive. Defrag takes the information that is stored on the hd and puts it all in the proper order so that the individual parts of a file are stored together and not all over your hd. A cd rom and dvd rom do not write the disk, and even on the writers the disk are not written to like a hd. Defrag only works on HD and FD not CD's or DVD's. Hope this helps.