Because the volume retention period is the latest retention period of any of its data sets, changes made to the data sets in a volume might change volume retention information. Volume retention information consists of the following:
Table 188 Volume Retention Information
Item  | 
Description  | 
|---|---|
Volume expiration type  | 
Expiration type of the data set that is to be kept for the longest period of time (meaning, due to expire last).  | 
Volume expiration date  | 
Expiration date of the data set on the volume due to expire last. If the volume contains a data set with a non-date expiration type (for example, catalog control), the volume’s expiration date is indefinite (meaning, not set).  | 
Expiration data set number  | 
File sequence number of the data set due to expire last.  | 
Last data set expiration date and type  | 
Expiration date and type of the last data set physically on the volume. (This field is used for choosing matching volumes for stacking.)  | 
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