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需要的磁盘越来越多,但空间实在少得可怜。所以,现在的软件分发大都依赖于CD-ROM了。现在,硬盘容量的不断增大使CD-RW盘片和CD-R技术在备份和存储工作中扮演了越来越重要的角色。与此同时,DVD-ROM在软件和娱乐方面的地位正在逐渐增强。那么,只用一种驱动器来处理所有这些格式是不是效率更高一些呢? 微软/Intel PC99规范已经将DVD-ROM驱动器列为家用PC系统的必需组件,但许多用户还是会将价钱更低的CD-R和CD-RW用于高容量存储的首选设备。 问题在于不同盘片的规范差异甚远。CD-R和CD-RW盘片的激光束必需经过调整,这是因为写操作所需要的能量比读操作高许多。此外,DVD-ROM对于较高的数据密度也需要不同类型的激光。CD所使用的波
The disk needs more and more, but the space is really pitiful. So, most software distributions now rely on CD-ROMs. The growing capacity of hard disks now makes CD-RW discs and CD-R technologies playing an increasingly important role in backup and storage. At the same time, DVD-ROM’s software and entertainment status is gradually increasing. So is not it more efficient to handle all of these formats with only one drive? The Microsoft / Intel PC99 specification has listed DVD-ROM drives as a necessary component of a home PC system, but many users will still be cheaper CD-R and CD-RW are the preferred devices for high-capacity storage. The problem is that the specifications for different discs are far different. The laser beam for CD-R and CD-RW discs needs to be adjusted because the energy required for the write operation is much higher than the read operation. In addition, DVD-ROMs require different types of lasers for higher data densities. Waves used by CDs