Where does DFSMShsm store my data?

DFSMShsm stores data in a device-independent format so it can move data to any of the following devices:

Tape for the 3480, 3480X, 3490, and 3590-1 Magnetic Tape Subsystems.
DASD for Models 3380, 3390, and 9345.

DFSMShsm supports the following volume types:

Level 0 volumes are volumes containing data sets that are directly accessible to you and the jobs you run. DFSMShsm-managed volumes are those level 0 volumes that are managed by the DFSMShsm automatic functions.
Level 0 volumes, and DFSMShsm-managed volumes, can be any DFSMShsm-supported DASD. These volumes must be mounted and online when you refer to them with DFSMShsm commands.
Migration level 1 volumes contain data sets that DFSMShsm moved from level 0 volumes and contain the backup versions that were created from a DFSMShsm BACKDS or HBACKDS command.
Migration level 1 volumes are DFSMShsm-supported DASD on which DFSMShsm maintains your data in DFSMShsm format. Normally, these volumes are permanently mounted and online.
Migration level 2 volumes are volumes containing data sets moved from migration level 1 volumes or level 0 volumes.
Migration level 2 volumes are DFSMShsm-supported tape, or DASD, on which DFSMShsm maintains your data in DFSMShsm format. Normally, these volumes are not mounted or online.
Daily backup volumes are volumes containing the most current backup versions of data sets copied from level 0 volumes. These volumes may also contain earlier backup versions of these data sets.
Daily backup volumes are DFSMShsm-supported tape, or DASD, on which DFSMShsm maintains your data in DFSMShsm format. Normally, these volumes are not mounted or online.
Spill backup volumes are volumes containing earlier backup versions of data sets, which were moved from DASD backup volumes.
Spill backup volumes are DFSMShsm-supported tape, or DASD, on which DFSMShsm maintains your data sets in DFSMShsm format. Normally, these volumes are not mounted or online.
Dump volumes are DFSMShsm-owned magnetic tape volumes. When a volume is dumped, DFSMShsm invokes DFSMSdss to write a copy of the entire allocated space of that volume on a dump volume.
Dump volumes are DFSMShsm-supported tape. Image copies of volumes are produced by the full volume dump function of DFSMSdss, which is invoked by DFSMShsm.
Aggregate backup volumes contain copies of the data sets of a user-defined group of data sets, along with control information for those data sets. These data sets and their control information are stored as a group so that they can be recovered (if necessary) as an entity by an aggregate recovery process.
Aggregate backup volumes are DFSMShsm-supported tape and are normally not mounted or online.
Fast replication target volumes contain the fast replication backup copies of DFSMShsm-managed volumes. Fast replication target volumes are contained within SMS copy pool backup storage groups.