How to Add Filesystem Space

You can add filesystem space in three ways:

Add a new disk, create a filesystem on it, and mount it as a subdirectory on an existing filesystem.
Change the size of the existing filesystems by removing space from one partition and adding it to another partition on the same disk.
Add another disk and grow an existing filesystem onto that disk with the growfs or xfs_growfs command.

These three methods of adding filesystem space are discussed in the following subsections.