Installing the Domino server software on an OS/2 system requires a High Performance File System (HPFS) volume. Some Domino installation file names exceed the 8.3 file naming convention limit present on FAT volumes.
Note: If your site is using OS/2 Warp Server for e-business, Domino can be installed on a JFS Volume which also supports long file names and performs better than HPFS in multi-processor environments.