# Disk Space

## Temporary Disk Space Required by the Installer

When a TIBCO Enterprise Message Service package is unpacked, it is extracted into a temporary folder.

The installer requires at least 250 MB of free space in the temporary directory. On Microsoft Windows, the temporary directory location is %SystemDrive%:\Documents and Settings\user_name\Local Settings\Temp.

If your system does not have sufficient free disk space in the default temporary directory, you can run the installer with a different temporary directory by using the following option when starting the installer. For example:

    TIBCOUniversalInstaller -is:tempdir \new_tmp

where \new_tmp has sufficient free disk space.

The installer calculates the disk space required in product home location for the selected components. The calculation is done before the actual installation (copying of files to system) begins. The installer will proceed only if sufficient free disk space is available in product home location.

However, if disk space is consumed by another process while the installer is copying the files, and if the required disk space is thereby reduced, the installer may fail and will then give a failure message.

While performing installation, avoid running other processes that consume disk space in product home location.

## VMS

To run EMS client programs, user accounts must have `NETMBX` and `TMPMBX` privileges.

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