Ext2 stands for second extended file system. Ext3 stands for third extended file system. Ext4 stands for fourth extended file system. … This was developed to overcome the limitation of the original ext file system.

What is ext3 and Ext4 file system?

Ext4 stands for fourth extended file system. It was introduced in 2008. … You can also mount an existing ext3 fs as ext4 fs (without having to upgrade it). Several other new features are introduced in ext4: multiblock allocation, delayed allocation, journal checksum. fast fsck, etc.

What’s the difference between ext3 and Ext4?

Ext4 is the default file system on most Linux distributions for a reason. It’s an improved version of the older Ext3 file system. It’s not the most cutting-edge file system, but that’s good: It means Ext4 is rock-solid and stable. In the future, Linux distributions will gradually shift towards BtrFS.