第二个版本，JFFS2，作为用于微型嵌入式设备的原始闪存芯片的实际文件系统而出现。
The second version, JFFS2, is emerging as the de facto filesystem for raw flash chips for tiny embedded devices.
initrd对于在嵌入式系统中加载到RAM磁盘里的非持久性根文件系统来说也非常有用。
The initrd is also useful as a non-persistent root file system mounted in a RAM disk for embedded Linux systems.
在没有存储设备的嵌入式系统中，initrd是永久的根文件系统。
In embedded systems with no mutable storage, the initrd is the permanent root file system.
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