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The IBM TotalStorage 3494 Virtual Tape Server (VTS) has revolutionized the way zSeries customers utilize their tape resources. As the capability of the base VTS and its high availability Peer to Peer (PTP VTS) configuration has grown, so has the need to efficiently manage the large number of logical volumes a VTS supports. The VTS architecture currently supports a host interface that allows an application to obtain information about a specific logical volume, but is not an efficient method to use when information for a large number of logical volumes is required. This paper describes the use of a facility of the VTS (both base and in PTP configurations) through which an application can obtain information about all of the logical volumes a VTS manages.
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