Throughout the 1990s and early 2000s we all enjoyed increasingly faster CD and DVD drives, but then the growth curve leveled off. Will we ever see faster optical disc drives?

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问题

好奇的超级用户阅读器User1301428想知道为什么磁盘驱动器没有得到更快的速度。他写道：

I was thinking about the fact that in the last years I have never seen CDs and DVDs supporting writing/reading speeds higher than 52X and 16X, respectively.

Is this a commercial choice (i.e. manufacturers don’t care about optical discs anymore and focus more on flash memories and SSD drives) or a technical limitation (i.e. optical drives cannot support higher writing and reading speeds)?

好吧，是哪一个？这样的驱动器是市场不切实际还是建设不切实际？

答案

超级用户贡献者PhonicUK提供了以下解释：

主要是技术上的限制。简单地说，如果你旋转磁盘太快，它开始变得不稳定和摇摆，甚至开始在绝对压力下分裂。充其量这意味着读/写错误，而更糟的是，这意味着它有可能松动并造成损坏。

在52倍的速度下，磁盘以24000转/分左右的速度旋转–在27000转/分左右，磁盘将开始破裂。

丹·尼利提醒我们有人试图突破速度障碍：

About a decade ago there were CD drives that used multiple laser beams to read 7 tracks at once for higher performance without having to spin the disk extremely fast. However they were expensive and apparently had reliability problems as well.

It’s also worth noting that it isn’t just a question of structural integrity of the disk at high RPMs, but also of noise.

最后，Ramhound指出，这当然是可能的，但由于蓝光的出现，它永远不会发生：

They could modify the disk in theory to suppor higher RPMs the problem of course is that they would create a new standard for a media that is slowly being discontinued. The simple fact is Blu-ray is the future, and most of the manufactures know that, so why waste money making a CD or DVD support faster burn times. You can already burn a double layer DVD in a few minutes.

看来我们只要在几分钟内把DL DVD烧掉就好了。

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