When separation by volume
is requested for a data set, the order
of preference for volume selection is as follows:
- Candidate volumes that are in different extent pools than
volumes
on the separation volume list are most preferred
- Candidate
volumes that are not on the separation volume list but
are in the same extent pools as the volumes on the separation volume
list are the next preferred
- When separation by volume is required,
SMS must allocate the data
set onto the volumes that are not used by any of the data sets in
the same separation group
- When separation by volume is preferred,
the candidate volumes
that are already occupied by other data sets in the separation group
are ranked lower and are less preferred.