After version 3.x, CA PAM is supposed to automatically resize the disk on boot when changes are made to the VM Disk. If this fails the "FilesystemCheckUpdate" patch should be applied to fix the problem. In case this patch fails there is a workaround possible for VMWare deployments.
Note: AWS deployments cannot use this workaround.
CA PAM 3.0.X - 3.1.X
This issue often causes errors when trying to upgrade with errors stating that there is not enough disk space to continue.