它们是一些可与物理设备(比如hba)链接的特定驱动器。
These are the specific drivers that interface to the physical devices such as HBAs.
DMS中所使用的容器则必须是预分配的文件或物理设备，如硬盘驱动器。
The containers used in DMS must be a pre-allocated file or physical device, such as a hard disk drive.
对于OLTP应用程序，将日志文件放置在单独的物理设备上是极其重要的，因为这样它们的频繁活动就不会给在同一硬盘驱动器上的其他工作带来不良影响。
For OLTP applications, it is very important to place the log files on a separate physical device where their high activity will not negatively impact other work on the same hard disk drive.
所有这些设备文件包含了不同属性，但都引用了相同的物理磁带驱动器0，且能任意使用。
All these device files contain different attributes but refer to the same physical tape drive, 0, and can be used at will.
在海量存储系统(MSS)中，物理上不存在的一种直接存储设备，它逻辑地存在于一个或几个登台驱动器上。
In MSS, a direct access storage device that does not physically exist. It exists logically on one or more staging drives.
在海量存储系统(MSS)中，物理上不存在的一种直接存储设备，它逻辑地存在于一个或几个登台驱动器上。
In MSS, a direct access storage device that does not physically exist. It exists logically on one or more staging drives.
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