Occasionally, installation of MPIO-based components (such as FSPM) may hang if data I/O occurs during installation to any disk subsystems controlled by MPIO.
Messages such as Restarting all SCSI adapters may be displayed while the FSPM installation is suspended. Microsoft specifies that I/O to MPIO-managed disk subsystems should be low or quiescent during the installation.
If this happens, restart the host and try the FSPM install or upgrade process again.