Each file stored on disk has an owner and a group, however the actual names of the user and group are not stored on disk.

存储在磁盘上的每个文件都有一个所有者和一个组，尽管用户和组的实际名称不存储在磁盘上。

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Use these disk to create user defined volume groups.

使用这些磁盘创建用户定义的卷组。

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Apart from keeping track of disk usage, the quota system empowers systems administrators to specify a soft limit of disk usage for any user or group.

除了跟踪磁盘使用量之外，系统管理员还可以通过配额系统为任何用户或组指定磁盘使用量的软限制。

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However, not every Mac user has the disk space or desire to run a Windows partition.

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The increasing demand for HD content for media consumption and rich formats such as HD DVD and Blu-Ray drives the demand for high capacity disk drives solutions in the end-user market.

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Perhaps the biggest gain may be in dual storage computers where a flash memory device is used for storing operating systems, software and frequently accessed content (and maybe even for write caching) while a hard disk drive provides much less expensive mass storage of user data.

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