All that MULTIBUF does, is to split the archive in multiple parts at well defined block sizes. If a block does not fit onto the tape, it prompts you for the next tape and starts it with this block again. Without MULTIBUF , restoring these archives might be tricky, especially if you are using the sequence information option. However, as MULTIBUF is written in plain ANSI--C it should compile cleanly on any system. The source of it is included with KBACKUP , so is a Makefile for compilation.