Tape migration level 2 volume contention

A tape ML2 volume can be in use in only one of the following ways at any single point in time:

As a target volume for migration data output. Primary space management, interval migration, secondary space management, and data set and volume command management all generate migration data output.
As a target volume for recycle.
As a source volume for recycle.
As a source volume for recall.
As a source volume for TAPECOPY.
As a source volume for ABACKUP.
As a target volume for ARECOVER.

This topic describes what DFSMShsm does to resolve volume contention among the different tasks that request the same tape ML2 volume.