A method and apparatus to recover a construct definition associated with a
logical volume in a virtual tape server (VTS) system following a disaster
situation involving a library manager database. The method and apparatus
re-establish the association between a logical volume or data file or
block and a construct definition or volume attribute that assigns certain
actions that may be taken on the logical volumes. Such actions and
constructs may be defined by a client processor or by the VTS system in
order to provide quality storage media management. The constructs may be
uploaded to or reconstructed within the library manager database in
combination with the host or virtual tape server and consequently made
available to the system. In particular, the method and apparatus are
configured to recover one or more of a storage group construct, a
management class construct, a storage class construct, and a data class
construct associated with a logical volume within a VTS system.