An ISO image is an archive file of an optical disc, composed of the data contents of every written sector of an optical disc, including the optical disc file system.
To make an ISO from local files, proceed as follows:
1. Click on the Make ISO icon in the Main Window. The project layout will be displayed in separate window.
2. Select a file system of a disc.
3. Click on the Add Files button, to select files and folders you want to burn on the disc, or simply drag files and folders from Windows Explorer.
4. Click on the Make button, to start a making process.
- Burn created file, to create a disc.
The UDF file system was developed when it became increasingly obvious that the ISO9660 file system used on CDs was no longer meeting the needs of rewritable media and DVDs. It was optimized mainly to accommodate large data volumes and to make it easy to modify an existing file system.
BurnAware can burn UDF and Bridge Discs, which contain both a UDF and an ISO9600 file system. The UDF file system can be read by, say, Windows 2000 and Windows XP with no special drivers. In case of doubt, Windows 2000 and Windows XP also read the UDF file system if both an ISO9660 and a UDF file system are detected on the medium. Writing in UDF format is particularly important when burning DVDs because UDF is the preferred operating system for these media.
ISO9660 is a file system that was designed with the aim of creating a file system that is as system-independent and so as compatible as possible. CDs with ISO9660 as the file system can be read on all operating systems.
ISO9660 supports filenames in 8.3 format in Level 1 (8 characters for the filename and 3 for the extension) and directory names 8 characters long. Only characters A-Z, 0-9 and the underscore (_) are allowed. The maximum interleaf depth is restricted to 8 levels (including root directory).
A total of 31 characters are allowed in Level 2 and can be read by Windows 95 and higher, whereas DOS and Windows 3.1 usually have trouble handling the long filenames.