内核通常具有某种类型的安全模式来管理对设备、文件、进程和对象的访问。

The kernel usually has some sort of security model that manages access to devices, files, processes, and objects.

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dms表空间由DB 2管理，既可以是文件，也可以是原始设备。

DMS table Spaces are managed by DB2, and can be files or raw devices.

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正如前面所讨论的，ZFS合并了卷管理功能来提取底层物理存储设备到文件系统。

As discussed earlier, ZFS incorporates a volume-management function to abstract underlying physical storage devices to the file system.

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