ext4

* The ext4 file system format supports volumes up to 1 exabyte in size, although the userspace tools cannot yet administer such filesystems.

Since Linux 2. 6. 29 ext3, ext4, gfs2 and jfs have the freeze feature as well.

Testing by the developer in 2010 showed performance to be similar to ext4 at low thread counts, and superior to ext4 at high thread counts.

* EXTLINUX, used to boot from Linux ext2 / ext3 / ext4 or btrfs filesystems.

* Linux ext2, ext3, and ext4: Much like UFS, these filesystems employ allocation techniques designed to keep fragmentation under control at all times.

ext4 is somewhat backward compatible with ext3, and thus has generally the same amount of support from defragmentation programs.

LABEL =/ / ext4 defaults 1 1

* ext4, the fourth extended file system.

* Extended file system, a file system created for Linux ; see also ext2, ext3 and ext4

He is the primary developer and maintainer of e2fsprogs, the userspace utilities for the ext2 and ext3 filesystems, and is a maintainer for the ext4 file system.

Allocate-on-flush ( also called delayed allocation ) is a computer file system feature implemented in the HFS +, XFS, Reiser4, ZFS, Btrfs and ext4 file systems.

The storage used for the MDT and OST backing filesystems is partitioned, optionally organized with logical volume management ( LVM ) and / or RAID, and normally formatted as ext4 file systems.

MDTs and OSTs currently use an enhanced version of ext4 called ldiskfs to store data.

Undelete was proposed in ext4, but is yet to be implemented.

* Ext2read A windows application to read / copy ext2 / ext3 / ext4 files residing in LVM partition.