What is "fsarchiver"

FSArchiver is a disk cloning utility for Linux. FSArchiver can save partitions containing different popular file systems to a disk image. It is a continuation of PartImage, which was a project from one of the same authors, and implements new features that PartImage lacks.

FSArchiver strives to be more feature-rich and less UX than PartImage. As a result, it is used by other software and toolsets for its functionality. Two of the most widely used features that PartImage lacks are support for multi-core compression and support for the commonly used Ext4 filesystem.