For example, each user's home directory would normally be stored in a separate volume. You do not need to know which file server houses any volume. AFS will locate the volume automatically. Indeed, it may move during its lifetime. If you wish to know where a volume is currently stored, see section Volume location .
Volumes have a size limit, or quota .
You may receive error messages if the volume you are writing into exceeds its quota. See section More on Volumes for more details. Mount points appear in the file system as directories. When you cd into a directory, you may be crossing a mount point and accessing a new volume, which may be stored on a different machine. Tokens AFS does not use UNIX user IDs for authentication.