The installation has set the dynamic patch byte at offset X'4E' to X'FF'. This dynamic patch byte indicates that DEFRAG default processing of linklist-indicated data sets is modified to cause extent relocation when the associated data set name is found in the linklist table, even though serialization not be obtained on the data set.
DEFRAG will NOT issue message ADR211I when it encounters a linklist-indicated data set. Instead, DEFRAG will move any selected extent for a linklist-indicated data set even if serialization is not obtained.
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DFSMSdss