Preventing interlock of control data sets

In a multiple DFSMShsm-host environment, you must provide protection to prevent control data sets from entering into interlock situations. If you do not have a Global Resource Serialization-like product installed, you must protect your control data sets by ensuring that the following situations/conditions occur:

That a CDS and the catalog where it is located are on the same volume. If you allocate a CDS on a volume other than the volume containing the catalog, interlock problems can occur.
That control data sets are not placed on migration level 1 volumes. Placing control data sets on migration level 1 volumes may lead to degraded performance or a lockout in a multiple DFSMShsm-host environment.
Volumes containing control data sets are subject to reserves in a multiple DFSMShsm-host environment. Migration level 1 volumes are also subject to reserves when small-data-set-packing data sets are accessed.
That each CDS has a unique high-level qualifier that is cataloged in the user catalog on its respective volume if all control data sets in the catalog cannot reside on the same volume.
That control data sets are not placed on the same volume with system resource data sets.