All that MULTIBUFdoes, 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 MULTIBUFis written in plain ANSI-C it should compile cleanly on any system. The source of it is included with KBACKUP, so is a Makefilefor compilation.