You can see that files A, C, and D are now spread all over the disk which causes performance problems because the mechanism of the disk drive has to jump around to find all of the parts of the file.
New lens elements and glass materials ensure the clearest possible imaging performance, and the proven dust and splashproof mechanism originally featured in the Four Thirds SHG (Super High Grade) series lenses is now incorporated for the first time in a Micro Four Thirds System lens.