The pubset is an important management unit under HSMS. A pubset is a set of public disk storages with a common catalog. It is defined by its pubset ID. HSMS offers full support of MPVS (multiple public volume set) systems.
HSMS also supports shared pubset systems: the backup, version backup, archival, and migration functions can be used to their full extent, although some restrictions in selecting files must be observed (see section "Working with shared SF pubsets").
Immediately following HSMS installation, only the home pubset is under HSMS control. All other pubsets are in the UNDEFINED state and have no entry in the HSMS control file.
A pubset in an MPVS system can either remain outside HSMS control in an undefined state or be assigned by the HSMS administrator to either of the two online storage levels S0 and S1 (see next page).