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如今主流游戏都是以OD-ROM为储存介质,不但可以方便地移动和保存,还可以包含大量精美的过场动画、CD音乐等。许多游戏的安装只占硬盘很少空间,在进行游戏时需要反复从光盘中读取数据,这就需要光驱能够轻松读盘并且读盘速度快。读盘速度快就是要求“能在很短时间内大量传输数据”,不过现在许多标称自己是“3x或4x速”的高速光驱根本无法达到真正的30或40多速的。因为它们的读盘方式各有不同:很多标示为40多速的光驱只有在读取光盘最外圈时才有可能达到标称速度,而读内圈时的速度却远远低于标称值,比如40速的光驱可能会降低到24甚至16倍速。出现这种情况,原因就在于现在大多数光驱采用的是一种被称为“恒定角速度”(Constant Angular Velocity简称CAV)的技术,即无论激光
Now mainstream games are based on OD-ROM storage media, not only can be easily moved and saved, you can also contain a large number of beautiful cinematics, CD music and so on. Many games only occupy hard disk space for installation, you need to repeatedly read data from the disc during the game, which requires the optical drive can easily read the disc and read the disc speed. The fast disk read requires “a lot of data to be transferred in a very short amount of time,” but many high-speed optical drives, now claiming to be “3x or 4x”, simply can not reach a true 30 or 40 speed. Because they have different ways to read the disk: many of the 40 multi-speed optical disk drive is only possible to achieve the nominal speed when reading the outermost disk, while reading the inner speed is far below the nominal , Such as 40-speed optical drive may be reduced to 24 or 16 speed. The reason for this is that most optical drives now use a technique called Constant Angular Velocity (CAV), which means that regardless of the laser