Volume Users
The Volume Users attributes provide data that assists a system administrator with identifying the applications that are allocated to a logical volume and the data sets that are being used on the volume by each application.
Application: The name of the application (STC, TSO user, or batch job) using the volume.
ASID: ASID of the application using the volume, displayed as 4 hex digits.
Data Set Name: The name of the data set on the volume that is allocated.
DD Name: The DDNAME associated with the allocation.
Managed System: The name identifying the monitored system.
Open Count: Number of opens issued by the job against the dataset.