Creating the user file systems

A user file system is allocated in the same way as you created the root file system. Choose a data set name that has the user name as one of the qualifiers and a size that provides sufficient space for the user's requirements.

Although the file system does not have to be SMS-managed, it is still highly suggested. Multivolume file systems are only supported as SMS-managed. (That is, you cannot have multivolume non-SMS-managed data sets.) As a user adds files and extends existing files, the data set increases in size to a maximum of 123 extents if secondary extents are specified in the allocation.

If more space is required, you might want to increase the size on the allocation or you might want to create additional file systems on different DASD volumes for a user and mount them at different mount points in the user's hierarchy.

The newly allocated data set has a root whose permission bits are set at 700. You can change the permissions only after the data set is mounted. See Changing the permission bits for a file for more information about changing permission bits for a file or directory.

Example: The following is a sample JCL to create a file system. Change the JCL where needed.

//USERIDA JOB ,'Compatibility Mode',                               
//        CLASS=A,MSGCLASS=X,MSGLEVEL=(1,1)                        
//DEFINE EXEC PGM=IDCAMS                                           
//SYSPRINT DD SYSOUT=H                                             
//SYSUDUMP DD SYSOUT=H                                             
//AMSDUMP  DD SYSOUT=H                                             
//DASD0    DD DISP=OLD,UNIT=3390,VOL=SER=ZFSVOL                    
//SYSIN    DD *                                                    
     DEFINE CLUSTER (NAME(OMVS.USER1) -                          
            VOLUMES(ZFSVOL) -                                      
            LINEAR CYLINDERS(10 1) SHAREOPTIONS(3))                 
/*                                                                 
//CREATE EXEC PGM=IOEAGFMT,REGION=0M,                              
// PARM=('-aggregate OMVS.USER1 -compat -owner 11 -perms o755')  
//SYSPRINT DD SYSOUT=H                                             
//STDOUT DD SYSOUT=H                                               
//STDERR DD SYSOUT=H                                               
//SYSUDUMP DD SYSOUT=H                                             
//CEEDUMP DD SYSOUT=H  
//*