Hi, this is just due to the fundamental difference between processing SMS and 
nonSMS managed volumes.  For nonSMS,  migration eligibility is managed at the 
Volume level, through HSM parameters.  For SMS, migration eligibility is 
managed at the Data Set level, through SMS Management Class parameters.  Refer 
to the DFSMShsm Storage Administration chapter on MIGRATE and you will notice 
that there are two sections, one for SMS and one for nonSMS.  The only valid 
value for SMS managed volumes is DAYS(0).  DAYS(0) basically says to ignore the 
threshold and migrate all data sets that are eligible, based on the Management 
Class values.  (For automatic processing, migration ends when the threshold has 
been met, even if there are more data sets that are eligible to be processed).  
For nonSMS, you can override the existing HSM migration parm by specifying 
DAYS(n).  Correct, you don't want to issue CONVERT and DBA/DBU only apply to 
nonSMS.

Glenn Wilcock
DFSMShsm Architect

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