Ext4

Ext4 is part of the Linux 2.6.28 kernel, read the previous link to know more details about that release.

Contents

   1. Introduction
   2. EXT4 features
         1. Compatibility
         2. Bigger filesystem/file sizes
         3. Subdirectory scalability
         4. Extents
         5. Multiblock allocation
         6. Delayed allocation
         7. Fast fsck
         8. Journal checksumming
         9. Online defragmentation
        10. Inode-related features
        11. Persistent preallocation
        12. Barriers on by default
   3. How to use Ext4
         1. Creating a new Ext4 filesystem from the scratch
         2. Migrate existing Ext3 filesystems to Ext4
         3. Mount an existing Ext3 filesystem with Ext4 without changing the format