The 君RESIZE function can be used to reserve space on disk for a file. The file must have been opened in a mode which permits writing. The syntax of 君RESIZE is :
SIZE 君RESIZE TIENO
TIENO is the tie number of file to resize
SIZE specifies the new size for the file in bytes
If the new size is larger than the current size of the specified file, the file is extended to the new size by writing bytes of zeros.