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Dataset without Data Class.

 
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zos5415

New User


Joined: 29 Aug 2008
Posts: 18
Location: China

PostPosted: Mon Apr 26, 2010 12:29 pm    Post subject: Dataset without Data Class.
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hi,guys,

when i use the follow jcl to create a GDG file.

Code:

//STP0100  EXEC  PGM=IEFBR14,   
//             COND=(0,NE)     
//DD1      DD    DSN=AATP.AAIP.CLEP64.PS(+1),
//            DISP=(,CATLG,DELETE),UNIT=SYSDA,
//            SPACE=(CYL,(1,5),RLSE),
//            DCB=(MODEL.DSCB1,BLKSIZE=27998,LRECL=4140,RECFM=VB)

but after the GDG generated, the Data class is **None**.

Code:

Data Set Name . . . . : AATP.AAIP.CLEP64.PS.G0001V00         
                                                                           
General Data                           Current Allocation                 
 Management class . . : THREWEEK        Allocated cylinders : 1           
 Storage class  . . . : DEVLPMNT        Allocated extents . : 1           
  Volume serial . . . : PAY112                                             
  Device type . . . . : 3390                                               
 Data class . . . . . : **None**       Current Utilization                 
  Organization  . . . : PS              Used cylinders  . . : 1           
  Record format . . . : VB              Used extents  . . . : 1           
  Record length . . . : 4140                                               
  Block size  . . . . : 27998                                             
  1st extent cylinders: 1                                                 
  Secondary cylinders : 5                                                 
  Data set name type  :                 SMS Compressible  :   NO           
                                                                           
  Creation date . . . : 2010/04/25      Referenced date . . : 2010/04/26   
  Expiration date . . : ***None***                                         

it seems the data set can be used without any error. but i want to know something hidden that cause the things happen.

can some guys give me a brief introducation ?
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dick scherrer

Site Director


Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Mon Apr 26, 2010 12:38 pm    Post subject:
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Hello,

Suggest you talk with your storage management people for an explanation of how things are set up in your environment. There are many ways to define/enforce these rules and they are completely site-specific.
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expat

Global Moderator


Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Mon Apr 26, 2010 2:34 pm    Post subject:
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If your storage environment is correctly set up, there should always be a DATACLAS allocated to a GDS. This removes the need for all of this Dummy / Model DSCB rubbish.

As suggested earlier, go speak to the storage people.
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