The key for a type L backup migrated data set record is the first 43 characters of the data set name. Under certain circumstances, DFSMShsm changes the 44th byte of the key. As a result, the key to the record might not correspond exactly with the first 43 characters of the data set name. The true 43rd character and the 44th character of the data set name are stored in the data portion of the record. An example of the key used with a type L backup migrated data set record is:

FIXCDS L USER.DATA.NAME