For now let's concentrate on physical disks.

现在我们先来关注物理磁盘。

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But they may not be dedicated physical disks.

但不是专门的物理磁盘。

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Representations of physical disks, such as luns.

物理磁盘的表示，比如lun。

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Users feel more comfortable with physical disks than with downloads, which can go wrong, cannot be resold, and are unsuitable as gifts.

ECONOMIST: MONITOR

MoviePoint will initially offer about 2, 500 movies -- only about a quarter of those offered by CinemaNow -- and a small fraction of what one can access via Netflix rentals of physical disks.

ENGADGET: Switched On: Blockbuster box boxes blocks to bust

Initially, rather than offer consumers what they wanted the ability to choose exactly which songs to buy, and to download them to either computers or portable music players the industry clung to the old format of song compilations (with just one or two hits) on physical disks.

ECONOMIST: The race to catch the iPod | The