PMP Mail Archive: PMP> RE: question about the printer mib

PMP Mail Archive: PMP> RE: question about the printer mib

PMP> RE: question about the printer mib

From: McDonald, Ira (imcdonald@sharplabs.com)
Date: Tue Feb 19 2002 - 16:09:08 EST

  • Next message: McDonald, Ira: "PMP> RE: question about the printer mib"

    Hi Juergen,

    The first counter, 'prtMarkerLifeCount', is set to zero at the
    time of manufacture of the printer. Every printer I've seen
    actually does keep this counter straight, because it's the
    primary basis of preventive maintenance (and also billing for
    leased printers).

    However, on page 26 of Printer MIB v2 in section 2.3, there
    is the following caution:

      "4. It is an implementation-specific matter as to whether or not MIB
       object values are persistent across power cycles or cold starts. It
       is particularly important that the values of the prtMarkerLifeCount
       object persist throughout the lifetime of the printer. Therefore, if
       the value of any MIB object persists across power cycles, then the
       prtMarkerLifeCount object must also persist."

    So there is no absolute guarantee that 'prtMarkerLifeCount' is
    always accurate for the life of the printer.

    The second counter, 'prtMarkerPowerOnCount', is set to zero
    every time that the printer is powered on. Again, this is
    correctly maintained in every printer I've seen.

    Cheers,
    - Ira McDonald (co-editor of Printer MIB v2)

    PS - I copied the Printer MIB mailing list on this reply, in case
    someone else wants to comment.

    -----Original Message-----
    From: Juergen Schoenwaelder [mailto:schoenw@ibr.cs.tu-bs.de]
    Sent: Tuesday, February 19, 2002 2:03 AM
    To: imcdonald@sharplabs.com
    Cc: Ron.Bergman@Hitachi-hkis.com; Bert Wijnen
    Subject: question about the printer mib

    While writing code for the Printer-MIB, I started to wonder what the
    intention of prtMarkerLifeCount and prtMarkerPowerOnCount is:

    prtMarkerLifeCount OBJECT-TYPE
        SYNTAX Counter32
        MAX-ACCESS read-only
        STATUS current
        DESCRIPTION
            "The count of the number of units of measure counted during
            the life of printer using units of measure as specified by
            CounterUnit."
        ::= { prtMarkerEntry 4 }

    prtMarkerPowerOnCount OBJECT-TYPE
        SYNTAX Counter32
        MAX-ACCESS read-only
        STATUS current
        DESCRIPTION
            "The count of the number of units of measure counted since the
            equipment was most recently powered on using units of measure as
            specified by CounterUnit."
        ::= { prtMarkerEntry 5 }

    Do you assume that these Counters start at zero at the printer's birth
    event or power on event? Is the idea that management applications can
    rely on this to be true?

    /js

    -- 
    Juergen Schoenwaelder      University of Osnabrueck
    <schoenw@inf.uos.de>       Dept. of Mathematics and Computer Science
    Phone: +49 541 969 2483    Albrechtstr. 28, 49069 Osnabrueck, Germany
    Fax:   +49 541 969 2770    <http://www.informatik.uni-osnabrueck.de/>
    



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