A call to the mount function in UNIX. The mount function requests that a removable file system contained on the block special file identified by spec be mounted on the directory identified by dir. The spec and dir arguments are pointers to path names. After a successful call to mount, all references to the file dir refer to the root directory on the mounted file system. The mounted file system is inserted into the kernel list of all mounted file systems. This list can be examined through the mounted file system table.