To dynamically extend the size of the TFS, the maximum size or a maximum number of extensions can be specified. For example:

F tfs,GROW filesysname

where filesysname is the name of the file system to be extended. Each extension is 1 K blocks.

The default extend settings can be changed. For example:

F tfs,EA number
F tfs,EM number

where number is the number of automatic or manual extends allowed for a file system that is subsequently mounted without using the -ea or -em parameters.