ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3.

Ext4 implements various ioctls which can be used by applications to access ext4-specific functionality. An incomplete list of these ioctls is shown in the table below.

The ext4 file system is a scalable extension of the ext3 file system. With Red Hat Enterprise Linux 7, it can support a maximum individual file size of 16 terabytes, and file systems to a maximum …

Ext4 is the evolution of the most used Linux filesystem, Ext3. In many ways, Ext4 is a deeper improvement over Ext3 than Ext3 was over Ext2. Ext3 was mostly about adding journaling to …

In particular, file systems previously intended for use with the ext2 and ext3 file systems can be mounted using the ext4 file system driver, and indeed in many modern Linux distributions, the …

Apr 24, 2024 · ext4, the successor of ext3, is a Linux journaling file system and a cornerstone of storage management since its introduction in 2008. It supports large file systems and many …

May 25, 2017 · Take a walk through EXT4's history, features, and optimal use, and learn how it differs from previous iterations of the EXT filesystem.

May 30, 2023 · The first in a series of blogs aimed at providing an insight into the internal disk layout of an ext4 file system.

Nov 14, 2025 · The mount.ext4 command is an essential tool for managing ext4 - formatted partitions in Linux. By understanding the fundamental concepts, usage methods, common …

Sep 28, 2025 · Ext4 has more advantages than the previous two file systems. It can reduce file fragmentation, improve flash memory life, and store larger files than Ext2 and Ext3.