The Web Start installation requires 115 MB, the tarball distributionthat contains the Java Runtime Environment (see below) requires 142 MBand the tarball without the JRE requires 101 MB. If the WebStart is used to install the OT, this space mustbe available in the location where Web Start is configured to installdownloaded applications. The default for this will be a subdirectoryof your home space (Unix/MAC/Linux) or in the profile area(Windows). In case of a tarball installation the disk space must beavailable in the location where the OT will be installed.