However, the nbstl command contains options to view different versions and to modify the definitions of existing storage lifecycle policy versions without creating a new version:

• -all_versions

  Use to display all versions of a storage lifecycle policy definition. Without specifying this option, only the most recent version is displayed by default.

• -version number

  Use to display a specific version.

• -modify_current

  Use with most nbstl configuration options to make changes to the current storage lifecycle policy version without creating a new version. Knowing the current version number is not necessary if this option is used.

• -modify_version -version number

  Use with most nbstl configuration options to make changes to a specific version without creating a new version.

Use -modify_current or -modify_version to change any of the following configuration options:

• The duplication priority (-dp)

• The storage unit to be used for each destination (-residence)

• The volume pool for each destination (-pool)

• The server group for each destination(-server_group)

• The retention level for each destination(-rl)

• The alternate read server for each destination (-as)

• The preserve multiplexing option for duplication copies (-mpx)

Some configuration options cannot be changed using -modify_current or -modify_version. To change any of the following options, you must create an entirely new storage lifecycle policy version:

• The type of the destination: Backup, duplication, snapshot (-uf)

• The retention type for the destination: Fixed, capacity managed, expire after duplication (-managed)

• The source of a destination, used primarily in hierarchical storage lifecycle policy configurations (-source)

• The data classification of an existing version (-dc)

• The number of destinations. You cannot add a destination or remove a destination from the storage lifecycle policy definitions.