Check free space on an Xsan SAN volume
There are several ways to see how much space is available on a SAN volume or on storage pools in a volume.
From a client or controller computer that has the volume mounted, select the volume in a Finder window, and look at the size information at the bottom of the window (in Column or List view) or choose File > Get Info. You can also use Disk Utility.
The reported size and free space for an Xsan volume doesn’t include space in storage pools that contain only journal data and metadata. Only space on storage pools where users can store files is counted (that is, storage pools set to be used for “User data only” or “Metadata and User Data”).
For example, if you create a volume consisting of four 120 GB storage pools and configure one for journal and metadata only, Server reports the size of the volume as 360 GB, not 480 GB.