Check the definition of the SMS management class assigned and see if 'PARTIAL 
RELEASE' is specified.

<snip>
I am trying to understand why the space allocation was changed when I allocated 
the USERCAT.  The USERCAT is SMS managed and resided on vol PLN902 before I 
reallocated on PLN906.   In the CLUSTER definition I had the following :
 
    DEFINE                            -       
            USERCATALOG               -       
            (NAME (SYS1.ICFCAT.UCATPLN)    -  
            CYL(25,5)                 -       
            VOLUME(PLN906)            -       
            STORAGECLASS(GUASPACE)    -       
            ICFCATALOG                -       
            STRNO(3)                  -       
            FREESPACE(20 20)          -       
            NOIMBED                   -       
            LOCK                      -       
            SHAREOPTIONS(3 4))        -       
    DATA(                             -       
         CONTROLINTERVALSIZE(4096))           
/*                                            

The catalog was successfully allocated:
IDC0510I CATALOG ALLOCATION STATUS FOR VOLUME PLN906 IS 0  
IDC0512I NAME GENERATED-(I) SYS1.ICFCAT.UCATPLN.CATINDEX   
IDC0181I STORAGECLASS USED IS GUASPACE                     
IDC0001I FUNCTION COMPLETED, HIGHEST CONDITION CODE WAS 0  

However it shows :
ALLOCATION                                                                 
  SPACE-TYPE------CYLINDER     HI-A-RBA--------15482880                    
  SPACE-PRI-------------21     HI-U-RBA---------2949120                    
  SPACE-SEC--------------5                                                 
VOLUME                                                                     
  VOLSER------------PLN906     PHYREC-SIZE---------4096     HI-A-RBA-------
 
Why would the system override my allocation of 25 cylinders primary?  Is there 
a reason to be concerned?  How would I prevent this from happening again? 
</snip>
 

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