# VTS Virtual Devices

The VTS Virtual Devices attributes provide detailed internal performance information about the virtual devices associated with a virtual tape server (VTS).

Average Cache Hit Mount Time: The average time required for a mount request for a virtual tape volume in a TVS for which the virtual tape volume is already located in the TVC. In this case, there is no physical tape mount associated with the virtual mount request.

Average Concurrent Mounts: The average number of virtual tape drives available to this VTS that were used at the same time.

Average Fast Ready Mount Time: The average fast-ready mount time for tape drives in this VTS. Requests in a virtual tape server are satisfied by the tape header information kept in the TVC for a previously-initialized virtual tape volume. This approach avoids a physical tape mount for volume verification and tape management system integrity checking.

Average Mount Pend Time: The average amount of time in seconds that an MVS™ system waited for a virtual tape volume to be mounted on a virtual tape drive.

Average Recall Mount Time: The average time required to perform a recall mount on this VTS. A recall mount is a virtual mount that results in a physical mount.

Average Time Mount Used: The average time in seconds that a virtual tape drive in this VTS was mounted This time is accrued from the completion of the mount until a demount request is issued.

Data To Copy: The amount of data that to be copied in gigabytes.

LCU Disconnect Time: The average disconnect time in milliseconds for each I/O to each virtual drive in the logical control unit of this virtual tape server.

Managed System: The SMS name of this system.

Maximum Cache Hit Mount Time: The maximum time required for a mount request for a virtual tape volume in a TVS for which the virtual tape volume is already located in the TVC. In this case, there is no physical tape mount associated with the virtual mount request.

Maximum Concurrent Mounts: The maximum number of virtual tape drives available to this VTS that were used at the same time.

Maximum Fast Ready Mount Time: The maximum fast-ready mount time for tape drives in this VTS. Requests in a virtual tape server are satisfied by the tape header information kept in the TVC for a previously-initialized virtual tape volume. This approach avoids a physical tape mount for volume verification and tape management system integrity checking.

Maximum Mount Pend Time: The maximum amount of time in seconds that an MVS system waited for a virtual tape volume to be mounted on a virtual tape drive.

Maximum Recall Mount Time: The maximum time required to perform a recall mount on this VTS. A recall mount is a virtual mount that results in a physical mount.

Maximum Time Mount Used: The maximum time in seconds that a virtual tape drive in this VTS was mounted This time is accrued from the completion of the mount until a demount request is issued.

Minimum Cache Hit Mount Time: The minimum time required for a mount request for a virtual tape volume in a TVS for which the virtual tape volume is already located in the TVC. In this case, there is no physical tape mount associated with the virtual mount request.

Minimum Concurrent Mounts: The minimum number of virtual tape drives available to this VTS that were used at the same time.

Minimum Fast Ready Mount Time: The minimum fast-ready mount time for tape drives in this VTS. Requests in a virtual tape server are satisfied by the tape header information kept in the TVC for a previously-initialized virtual tape volume. This approach avoids a physical tape mount for volume verification and tape management system integrity checking.

Minimum Mount Pend Time: The minimum amount of time in seconds that an MVS system waited for a virtual tape volume to be mounted on a virtual tape drive.

Minimum Recall Mount Time: The minimum time required to perform a recall mount on this VTS. A recall mount is a virtual mount that results in a physical mount.

Minimum Time Mount Used: The minimum time in seconds that a virtual tape drive in this VTS was mounted This time is accrued from the completion of the mount until a demount request is issued.

Time Stamp: Displays the date and time this data was collected from the VTS.

Unit B180 Mounts: The mounts for unit B18-0.

Unit B181 Mounts: The mounts for unit B18-1.

Virtual Drives Configured: The number of virtual tape drives configured for this VTS.

Virtual Drives Online: The number of virtual tape drives online for this virtual tape server.

Volumes To Copy: The number of logical volumes that can be copied.

VTS LIB TY: Specifies the library type of this VTS.

- Stand Alone: VTS that is not part of a peer-to-peer VTS environment.
- Distributed: VTS that is part of a peer-to-peer VTS environment, but has not been designated for user interface commands.
- Distributed UI: VTS that is part of a peer-to-peer VTS environment, and has been designated for user interface commands.
- Composite: Logical view of a peer-to-peer VTS environment.

VTS Name: The name of this virtual tape server.