File Systems

File systems on different operating systems can use different size addressing. Most current file systems use 32-bit or 64-bit addressing. The operating systems/file systems using these two sizes are listed below.

The File Handler is configured to work with either 32-bit or 64-bit addressing. It is vital that all applications sharing a file use a File Handler configured the same, or data corruption can occur.

You can configure the File Handler to use 32-bit addressing in a file system that uses 64-bit addressing. In this case, all files will be safely limited in size (to 32-bit addressing) by the File Handler.

32-bit file systems

64-bit file systems

File systems and FILEMAXSIZE

The underlying file system affects the value to which this File Handler configuration option should be set.

Warnings:

Do not set FILEMAXSIZE to 8 under any of the following circumstances:
- You are running applications on an operating system which does not support a 64-bit file system.
- You are running applications that access FAT file systems, since such file systems do not support file addressibility greater than 32-bit file addressing.
- If any accessing program needs to access a shared file in a 32-bit file system.
- You are sharing files with applications using earlier versions of the Micro Focus COBOL product that only supported 32-bit file access.
All applications accessing a file must run with the File Handler configured with the same value for FILEMAXSIZE.
Only 32-bit (4GB) support is provided for Novell systems.

Appendix A: File Systems

32-bit file systems

64-bit file systems

File systems and FILEMAXSIZE