Quick Start
TSM represents physical storage devices and media with the
following administrator-defined objects:
- Device Class
- Each device is associated with a device class that specifies the device
type and how the device manages its media. TSM has a predefined device
class (DISK) for random access devices.
- Storage Pools and Volumes
- A storage pool is a named collection of storage volumes of the same media
type. A storage pool is associated with a device class. For
example, a 3490 tape storage pool contains only 3490 tape volumes. A
storage pool volume is associated with a specific storage pool.
Figure 9 summarizes the relationships among the physical device
environment, TSM storage objects, and TSM clients. The numbers below
correspond to the numbers in the figure.
- (1)
- When clients are registered, they are associated with a policy
domain. The other TSM policy objects are within the policy
domain.
- (2) (3)
- When a file is backed up, archived, or migrated from a client, it is bound
to a management class. A management class and the backup and archive
copy groups within it specify where files are stored and how they are managed
when they are backed up, archived, or migrated from a client (space-managed
files).
- (4) (5)
- Storage pools are the destinations for backed up, archived, or
space-managed files. Copy groups specify storage pools for backed up or
archived files. Management classes specify storage pools for
space-managed files.
Storage pools are mapped to device classes, which represent devices.
The storage pool contains volumes as indicated in the device type associated
with the device class. For example, a storage pool that is mapped to a
device class with a device type of CARTRIDGE contains only cartridge
tapes.
All devices require a device class that specifies a device type.
- (6)
- Files that are initially stored on disk storage pools can migrate to tape
storage pools if the pools are set up in a storage hierarchy.
Figure 9. Putting it All Together

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