Hello,
in order to prevent releasing of unused space for some datasets, I allocated it 
yesterday with MC that has Partial release parameter set to 'No'. However, 
today when I look at some of those datasets, they look like the space was 
first released (primary extent is 1 cyl, allocated was 200), and then as the 
data was loaded it took 11 secondary extents. This is exactly what I wanted 
to prevent. Can someone explain to me how this happened?

General Data                          Current Allocation         
Management class . . : MCNORLSE       Allocated cylinders : 221 
Storage class  . . . : MEDIUM         Allocated extents . : 12  
Volume serial . . . : SSP122                                   
Device type . . . . : 3390                                     
Data class . . . . . : DCDYNV         Current Utilization        
Organization  . . . : PS             Used cylinders  . . : 204 
Record format . . . : FB             Used extents  . . . : 12  
Record length . . . : 3000                                    
Block size  . . . . : 27000                                   
1st extent cylinders: 1                                      
Secondary cylinders : 20                                     
Data set name type  :                SMS Compressible  :   NO  

Regards,
Natasa

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