On 5 December 2011 16:54, Mike Shaw <[email protected]> wrote: > Everyone: > > The POPs contains the text below within the description of the STIDP > instruction: > > "When the format bit is zero, the contents of the CPU-identification-number > field, in conjunction with the machine-type number, permit unique > identification of the CPU." > > Now, I always thought that the text above was stating that the CPU serial > number (6 chars, of which the rightmost four are useful) was 'guaranteed' > to be unique across all CPUs manufactured by IBM for that machine-type > number. However, I've found a case where two different customers of ours > both have 2817 machine types and the same CPU serial number. > > Is this a nomenclature issue? One customer has a 2817-605, and the other > has a 2817-704. Both boxes have the same CPU serial number. Is the > 'machine-type number' mentioned in the POPs text above supposed to refer to > the type plus sub-model, or just the type? > > I thought I understood this until I found this apparent duplicate CPU > serial number case.
This seems implausible... Are you sure your customers are not both using the same service bureau, and that one doesn't sell time to the other? Tony H.
