Unlike most other filesystems like Ext2fs and JFFS2, which reside on top of the underlying block device, TMPFS sits directly on top of the VM. Thus mounting the TMPFS filesystem is a simple affair.
诸如Ext2fs和JFFS2等大多数其它文件系统都驻留在底层块设备之上，而tmpfs与它们不同，它直接位于VM上。
At this point, you have the initrd image in a block device suitable for mounting.
现在，我们在一个适合挂载的块设备中就有了这个initrd映像。
It is connected to the external mounting block by a coupling that compensates unavoidable misalignment between the scale and the machine guideways.
它是连接到外部安装一个耦合，阻止机器不可避免的偏差补偿的规模和导轨之间。
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