This means that once a Snapshot has been made, you can mount and read and write to it like a regular block device.

这意味着，在创建快照之后，可以像常规块设备一样挂载和读写快照。

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The loop device is a device driver that allows you to mount a file as a block device and then interpret the file system it represents.

loop 设备 是一个设备驱动程序，利用它可以将文件作为一个块设备挂载到系统中，然后就可以查看这个文件系统中的内容了。

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And while a traditional ramdisk is a block device and requires a MKFS command of some kind before you can actually use it, TMPFS is a filesystem, not a block device; you just mount it, and it's there.

而且传统的虚拟磁盘是个块设备，并需要一个mkfs之类的命令才能真正地使用它，tmpfs是一个文件系统，而不是块设备；您只是安装它，它就可以使用了。

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