SHOWSUNIT

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              .-TRK-.   
>>-SHOWSUNIT=-+-REC-+------------------------------------------><
              +-KB--+   
              +-MB--+   
              '-CYL-'   

SHOWSUNIT
Specifies the unit of primary and secondary space to be allocated to the data set created when the SQL command is issued.
REC
Record of average size.
KB
Kilobyte, a kilobyte is 1024 bytes.
MB
Megabyte, a megabyte is 1048576 bytes.
TRK
Track of a direct access storage device (DASD).
CYL
Cylinder of a DASD.