Track density can be greatly enhanced by employing optical servo technology in a disk drive.

在磁盘驱动器中借助光伺服技术可以大幅度提高道密度。

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A head crash in a fixed hard disk generally destroys the data, whereas the failure of a tape drive or optical disk drive often leaves the data cartridge unharmed.

对于固定的硬盘，磁头撞击通常会破坏数据，然而磁带或光盘驱动器的错误通常对数据盘碟是无害的。

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This paper describes a new type of optical system in optical head for magneto-optic disk drive, expounds theoretical the basic principle for magneto-optio information read out.

本文叙述了一种新型磁光盘驱动器光学头的光学系统，并从理论上阐明了磁光信息读取的基本原理。

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When developing the PlayStation, Sony had considered removing its optical disk drive, opting instead to require gamers to download titles over the Internet, people familiar with the matter said.

WSJ: Sony to Unveil PS3 Successor

Key to the device is what's missing: Instead of the optical drive built into most other portable devices, the MacBook Air can wirelessly borrow another device's optical drive, so that it can access software or data stored on a disk.

FORBES: Magazine Article