Using outboard policy management support, you can manage logical
volumes much more easily and efficiently by grouping volumes that
have common characteristics on a set of physical stacked volumes,
providing volume affinity. This group of stacked volumes is known
as a
physical volume pool. Common characteristics can include
expiration dates, off-site disaster recovery data, backup copies,
and so on. Physical volume pooling provides your installation with
the following capabilities and benefits:
- It allows you to accurately charge for storage management services
that is based on the number of physical stacked volumes that are allocated
for a particular enterprise.
- It ensures that you can reserve groups of physical media for specific
uses or owners.
- It enhances adherence to security policies by grouping data for
different divisions or areas of an enterprise.
Use the library manager storage group policy construct to assign
logical volumes to physical stacked volumes and to group sets of stacked
volumes into physical volume pools. The VTS system writes the logical
volumes that are assigned to this storage group to the set of physical
volumes that are assigned to the physical volume pool.
If you do not specify a physical volume pool in the library manager
storage group policy construct, the VTS system writes the volumes
to the common scratch pool. If you update the library manager storage
group policy construct to allow for the assignment of logical volumes
to a specific physical volume pool, the VTS does not move the data
to the specified pool until the next time you rewind and unload the
logical volume from the tape drive.