From OpenSCADAWiki
The advantage of the live disk on USB-Flash, as it was previously mentioned, is a combination of USB-Flash drive features as a data storage and as a live disc at the same time. Also on the basis you can create compact, reliable and functional solutions of the embedded systems based on OpenSCADA, such as Programmable Logic Controllers (PLC), the panel controllers (with a touch screen), as well as simple SCADA-servers and operator's "quickly made" SCADA-stations, by recording a live disk to the stationary data storage (HDD, SSD or Flash). The reliability of this solution is achieved by placing the main non-modifiable software in the packed file, and operational data on the journaled file system.