Disk Space Requirements
The disk space requirements for RAD 8.5 are:
Approximately 11 GB for extracting the CDs (including the test environment).
150 MB for IBM Installation Manager during the installation and approximately 20 MB for user data and downloads.
Approximately 8 GB of disk space for IBM RAD 8.5, WebSphere 7.0.0.23 Test Environment (64 bit), and shared folders.