i really want to know the essential differences between those filesystems, for example the inodes pointer Structure and so on!
Thank you
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Ext2 is the first version of the filesystem created in 1993. It is stable and secure and can support volumes up to 4 TB. It doesn’t have any form of journaling. It can be used for partitions that doesn’t require journaling functions like boot partitions.
Ext3 is more secure and consistent compared to ext2. It has a journaling function that doesn’t require a lot of disks access. It is quite slow compared to ext4. It can be used with file with high-variable dimension and server-files.
Ext4 have high performances compared to its predecessors. It uses RAM to optimize read/write operations limiting access time. It is suggested for desktop use but not so recommended for servers (considering its young age).