Restrictions for the HASH Check function

The following restrictions apply when you run HASH check.

  • A pointer value must correspond to the RBA of the segment to which the pointer points. The sum of the pointer values for a specific pointer type also must correspond to the sum of the RBAs of the given segment type.
  • The location of the errors cannot be determined precisely.
  • Pointer value errors might theoretically compensate, but the probability to make such compensations is extremely low.
  • Errors on the following pointer types cannot be detected by the HASH Check function:
    • Index pointers in PSINDEX, or logical pointers in HALDB, because the index list entry (ILE) in the indirect list data set (ILDS) is not checked
    • Symbolic pointers
  • If /CK fields are defined by the SUBSEQ operand of the XDFLD statement of the primary database, the Index Key Check cannot be done between that database and its associated secondary index databases.