Obwohl sich äußerlich nicht viel geändert hat, bringt Ubuntu 9.04 (Jaunty Jackalope) diverse technische Verbesserungen. Dazu gehören eine deutlich verkürzte Bootzeit und Unterstützung für das neue Dateisystem Ext4.
Clonezilla, based on DRBL, Partition Image, ntfsclone, partclone, and udpcast, allows you to do bare metal backup and recovery.
it can clone many (40 plus!) computers simultaneously.
Filesystem supported: ext2, ext3, ext4, reiserfs, xfs, jfs of GNU/Linux, FAT, NTFS of MS Windows, and HFS+ of Mac OS. Therefore you can clone GNU/Linux, MS windows and Intel-based Mac OS, no matter it's 32-bit (x86) or 64-bit (x86-64) OS. For these file systems, only used blocks in partition are saved and restored. For unsupported file system, sector-to-sector copy is done by dd in Clonezilla.
UBIFS is a new filesystem designed to work with flash devices, developed by Nokia with help of the University of Szeged. It's important to understand that UBIFS is very different to any traditional filesystem: UBIFS does not work with block based devices, but pure flash based devices
In this release, Ext4 is adding one of its most important planned features: Delayed allocation (also called "Allocate-on-flush"). It doesn't change the disk format in any way, but it improves the performance in a wide range of workloads.