UBI details and JFFS2 square FS UBIFS

stay linux In the system Everything goes through the file , Because the system manipulates the time file Then we How to communicate with the upper level . This is inseparable from the file system . Early common file systems when jffs2  later stage Yes ubifs squash fs etc. Let's talk about The difference between two file systems

jffs2  Direct sum mtd communicate , Faster But with flash Bigger   jffs2 Can not meet this requirement . therefore ubi And then there will be

ubi Not a file system , It is a memory management He spoke directly to mtd Wake up management modular , Some file systems It's based on ubi above . such as ubifs and squash fs

ubifs and squash fs You don't need to be with mtd Direct communication , It just needs to be in ubi On the basis of Exchange documents

  So in ubifs and squash fs mount Must be First establish ubi .