6. DATA SOURCES › 6.1 Data Collection and Transport to CA MICS › 6.1.4 Errors Identified in Measurement Data

6.1.4 Errors Identified in Measurement Data

1.  VMS Release 4.7 errors.

    o  SCS record does not always reset counters to 0 for the
       next record; this can affect all fields in the DEMSCS
       file.

2.  VMS Release 5.0 and above.

    o  The disk I/O queue length (DSKIOQUE) in an MP
       environment is not always reset to 0 at the start of a
       measurement interval.  This can cause a queue length
       of some number with an I/O rate (DSKPSIO) of 0.  When
       this occurs, the response time (DSKAVRES) that is
       calculated from these values is set to missing.

    o  One field from the POOL record has garbage data stored
       on a sporadic but frequent basis.  These fields are
       the count of large request packets.  The garbage
       number is always the same (2147483649).  This problem
       was found to be the method that Compaq uses for this
       measurement.  If the number is larger than 499, then
       VMS MONITOR stores this large number.

    o  If you have a TK50 or TK70 model tape drive, then the
       nodename in the SCS record will be blank.  Compaq is
       aware of this problem.

3.  VMS Release 5.4

    o  Refer to the "VMS Version 5.4 Release Notes" published
       by Compaq Computer Corporation for additional
       information on problems and corrections in VMS.
       Chapters 2, 3, and 5 of this document contain specific
       references for VMS MONITOR and ACCOUNTING.