Defining the Root File System

During installation of z/OS® UNIX, a system programmer or storage administrator codes the ROOT statement in the BPXPRMxx member of SYS1.PARMLIB. This identifies the HFS data set containing the root file system for the system to logically mount when it starts z/OS UNIX system services.

   ROOT   FILESYSTEM('OMVS.ROOT')
          TYPE(HFS)
          MODE(RDWR)

The root file system is the starting point of the overall file structure. It consists of the root directory and any related HFS files or subdirectories. After installation is complete and the MVS™ system is running, you can create (allocate) an HFS data set, which contains the root file system.

See z/OS MVS Initialization and Tuning Reference z/OS MVS Initialization and Tuning Reference z/OS MVS Initialization and Tuning Reference for information about member BPXPRMxx.