Displaying MVS device allocation settings information

Use the DISPLAY ALLOC,OPTIONS command to display either of the following:

The current MVS Device Allocation settings that are in use, as set by the ALLOCxx parmlib member at IPL, or modified by the SETALLOC operator command.
The system defaults, if no ALLOCxx member has been specified or no SETALLOC command has been processed.

D ALLOC,OPTIONS
`D ALLOC,OPTIONS [,L={a\|name\|name-a}]`

ALLOC,OPTIONS: Indicates the categories and Allocation settings that are currently being used. Certain options are displayed only when they are applicable to the settings that the system is using.
L=a, name, or name-a: Specifies the display area (a), console name (name), or both (name-a) where the display is to appear.
If you omit this operand, the display is presented in the first available display area or the message area of the console through which you enter the command.

Note: For the output of the DISPLAY ALLOC,OPTIONS command, see the description of message IEFA003I in z/OS MVS System Messages, Vol 8 (IEF-IGD).

Example:

If you enter D ALLOC,OPTIONS,L=Z, the output appears in the following format:

IEFA003I 12.58.57 ALLOC OPTIONS 
SPACE           PRIMARY:          4                  
                SECONDARY:        24                 
                DIRECTORY:        0                  
                MEASURE:          AVEBLK             
                BLKLNGTH:         8192               
                ROUND:            NOROUND            
                PRIM_ORG:         NONCONTIG          
                RLSE:             RLSE               
UNIT            NAME:             SYSALLDA           
                UNITAFF:          SYSTEM DEFAULT     
                REDIRECTED_TAPE:  TAPE               
TIOT            SIZE:             32 (MAX DDS: 1635) 
SDSN_WAIT       WAITALLOC:        NO                 
VOLUME_ENQ      POLICY:           WTOR               
VOLUME_MNT      POLICY:           WTOR               
SPEC_WAIT       POLICY:           WTOR               
ALLC_OFFLN      POLICY:           WTOR               
CATLG_ERR       FAILJOB:          NO                 
                ERRORMSG:         NO                 
2DGT_EXPDT      POLICY:           ALLOW              
VERIFY_VOL      POLICY:           YES                
SYSTEM          IEFBR14_DELMIGDS: LEGACY             
                TAPELIB_PREF:     EQUAL              
                REMIND_INTV:      90                 
                VERIFY_UNCAT:     FAIL               
                TEMPDSFORMAT:     INCLUDELABEL       
                MEMDSENQMGMT:     DISABLE            
                BATCH_RCLMIGDS:   SERIAL             
                OPTCDB_SPLIT:     EXPLICIT