Before running DSN1COMP

If you run DSN1COMP on a segmented (non-UTS) table space, you must first determine the current instance qualifier so that you can code the correct data set name in the JCL.

To determine the current instance qualifier, query the IPREFIX column in the SYSTABLEPART catalog table, as shown in the following example query:

SELECT DBNAME, TSNAME, PARTITION, IPREFIX                 
      FROM SYSIBM.SYSTABLEPART                                
      WHERE DBNAME = 'DBMC0731' AND TSNAME = 'TPMC0731'       
      ORDER BY TSNAME, PARTITION;

The preceding query produces the following result:

  +-------------------------------------------+ 
  |  DBNAME  |  TSNAME  | PARTITION | IPREFIX | 
  +-------------------------------------------+ 
1_| DBMC0731 | TPMC0731 |         1 | J       | 
2_| DBMC0731 | TPMC0731 |         2 | J       | 
3_| DBMC0731 | TPMC0731 |         3 | J       | 
4_| DBMC0731 | TPMC0731 |         4 | J       | 
5_| DBMC0731 | TPMC0731 |         5 | J       | 
  +-------------------------------------------+

Notice that the current instance qualifier is J. You can use this value to code the data set name in the DSN1COMP JCL as follows.

//STEP1         EXEC PGM=DSN1COMP
//SYSUT1        DD DSN=vcatname.DSNDBC.DBMC0731.J0001.A001,DISP=SHR
//SYSPRINT      DD AYAOUT=*
//SYSUDUMP      DD AYAOUT=*