Increasing the size of the HFS file system

This topic discusses how to make more space available for the HFS file system. To make more space available for the HFS file system, you can move the entire full file system to another file system, as follows:

Have an authorized user enter a TSO/E UNMOUNT command to logically unmount the file system.
Tip: The REXX exec /usr/sbin/unmount performs essentially the same functions that the UNMOUNT statement performs. You can run it from the shell.
Use the DFSMSdss dump utility to logically dump the old file system to a sequential data set.
Rename the old file system.
Preallocate a new file system with a larger size and give it the original file system name.
Use the DFSMSdss restore utility to restore the old file system to the new file system.
Have an authorized user enter a TSO/E MOUNT command to logically mount the new file system. You can also run the REXX exec /usr/sbin/mount from the shell.
After you check the new file system, you can delete the old file system and the corresponding sequential data set.

You can also use the confighfs command to manage or expand the HFS file system. It resides in /usr/lpp/dfsms/bin/confighfs.

For zFS file systems, use the zfsadm grow command to extend the size of an aggregate.