Spool volume states

The following are possible states of a spool volume:

ACTIVE: The spool volume is in use. Allocation and deallocation of spool space is permitted. The volume is allocated to all members in the MAS configuration.
STARTING: The spool volume is not yet ACTIVE. It is in the process of MVS™ dynamic allocation or formatting. During this time, the volume is being dynamically allocated to each member in the MAS configuration. Allocation or deallocation of spool space is not permitted.
DRAINING: Jobs residing on the volume are selectable. Allocation of new spool space is not permitted. The volume must be completely empty before the drain process can complete. When the volume is completely empty, the volume will be dynamically unallocated on all members in the MAS configuration. The spool volume then becomes DRAINED.
DRAINED: The spool volume is empty and unallocated, that is, no allocated spool space remains on the volume, and the volume is unallocated on all members in the MAS configuration. The volume is considered nonexistent and can not be displayed by JES2.
HALTING: The spool volume stops allocation of spool space and does not select new work. Currently active work (that is, executing, printing, punching, etc.) is allowed to complete the current phase of processing. When all currently active work that has space allocated on the volume completes, the volume will be dynamically unallocated on all members in the MAS configuration. The spool volume then becomes INACTIVE.
INACTIVE: The spool volume may contain allocated spool space but does not permit further allocation or the processing of currently allocated spool space. The volume has been unallocated on all members in the MAS configuration and may be removed by the operator.

The following table summarizes the characteristics of the six status classifications of spool volumes:

STATUS	IN USE	ALLOCATABLE	SELECTABLE
STARTING	NO	NO	NO
ACTIVE	YES	YES	YES
DRAINING	YES	NO	YES
DRAINED	NO	NO	NO
HALTING	YES	NO	NO
INACTIVE	NO	NO	NO

IN USE - Active jobs may be using spool space on the volume.
ALLOCATABLE - Spool space may be allocated on the volume.
SELECTABLE - Jobs that have spool space on the volume may be selected for JES2 processing.

When an INACTIVE volume is not available to be started again (for example, the volume might be damaged and cannot be remounted) and the loss of spool space is acceptable, you must cancel all jobs residing on the volume and subsequently drain the volume. Because jobs associated with this volume might also have spool space allocated on other volumes, spool space on other spool volumes might be lost with all currently defined spool volumes active (excluding spool volumes that have been drained). JES2 recovers these lost track groups at the next all-member warm start if you also specify the SPOOL=VALIDATE start option or automatically within 7 days as provided by the automatic spool reclamation function, whichever occurs first. Other JES2 resources, such as job queue elements and job output elements, will be recovered.

For more information on recovering from a JES2 spool failure see Recovering from Spool Volume Failure in z/OS JES2 Initialization and Tuning Guide, SA32-0991.