A User-Defined File System (UDFS) is a file system that you can
create and manage yourself. You can create multiple UDFSs, with unique names.
You can specify other attributes for a UDFS when you create it. These attributes
include:
An auxiliary storage pool (ASP) number where you store the objects in
the UDFS.
The case-sensitivity that the names of all UDFS objects follow.
Note: If the UDFS is on an independent disk pool, ensure that the independent disk
pool is varied on and that the UDFS is unmounted before you start the save.