
This window allows an administrator to manage tape migration policies and their subsystem-specific  
overrides.
Subsystem-specific policies define migration rules to be applied on a subsystem basis instead of  using the 
default (basic) migration policy. When a migration run occurs and the storage class’s migration  policy 
does not have a subsystem-specific migration policy with the same subsystem ID, then the basic 
migration policy will be applied; otherwise, the matching subsystem-specific migration policy will be 
used. Click the Create Tape button on the Migration Policies window to create a  new policy.  To bring 
up the configuration for an existing policy, select the policy from the list and cli ck on the Configure 
button.
Field Descriptions
Policy Name. The descriptive name of the migration policy.
Policy ID. A unique ID associated with the migration policy.
Runtime Interval. The number of minutes to wait between the end of one migration run and the  start of 
the next. This can be any positive value up to 1000000.
Last Read Interval. The number of minutes that must pass since a file was last read before  it can 
become a candidate for migration.
Last Update Interval. The number of minutes that must pass since a file was last writt en before it can 
become a candidate for migration.
Migration Target. The desired percentage of free tape space to have availabl e when migration is 
completed. The migration will be terminated when this goal is reached or when no more files meet the  
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