When a file system will be migrated on an ongoing basis between multiple systems, the types of operating systems that are involved in these migrations are maintained in a target_list file. Knowing what these targets are allows VxFS to determine file system limits that are appropriate to all of these targets. The file system limits that are enforced are file size, user ID, and group ID. The contents of the target_list file are manipulated by using the fscdsadm command.