1. Structure of Partition Surprise

Partition Surprise consists of modules divided into these layers:

1. User-interface frontends: is a standalone program built on libsurprise implementing a user interface. The user is allowed to view and modify all the partitions. All the changes made by user may be discarded or commited into the disc.
2. Partition-module: this module compares original and current state. It takes care about all types of partition tables, decides, which optimalizations may be performed and which module will be called (on-line ext2 resizer, fast superblock rewrite, fast partition mover, slow filesystem rebuild).
3. General-converter: this module the a heart of Partition Surprise. It permorfs the general in-place conversion of any filesystem set to any filesystem set. The process is described in later paragraphs.
4. Filesystem backends: there's a special module for every supported filesystem. It supports reading metadata from filesystem and creating a new filesystem with hints given by GConv.