Hello all, My question is about enabling the CBU feature on a z/890. We are running z/OS 1.4 on z/890 260 with 4 LPARS. Each LPAR is defined in the activation profile with 2 initial CPs and 1 reserved. After we enable the CBU feature, in the D M=CPU command I see our machin is now a 370.
Our initial intent was only to add a 3rd CP. But a change from 260 to 370 not only implies the addition of a 3rd CP, but supposeably each CP is now much stronger. I did not have a chance to fully examine the situation, but I have noticed the following: - when I use MXI to see how many MIPS the machine has before the CBU is enabled it says 406, which is exactly what the capacity charts say for 260. - after enabling the CBU but before varying the 3rd CP online to the LPAR, it still says 406 MIPS. - after varying the 3rd CP online to the LPAR, is says 597 MIPS, which is what the charts say for a 360 (not a 370!). I realize the MXI calculation is based on the RMCTADJC field in the RMCT. I verified the value of RMCTADJC has not changed after of the enablement of the CBU nor after varying the 3rd CP online to the LPAR. This would have made sense to me on any other machine. But on a z/890 the strength of the CP can (supposably?) change instantly by the CBU feature being enabled. I decided to further test the situation and re-IPLed a test LPAR with 3 initial CPs. Then MXI noted 1045 MIPS, which is what the charts say for a 370. Further more, after the IPL the RMCTADJC value was different (smaller) then before the IPL. I couldnt find anything on the subject in the IBM Technical help database. I understand MXI is not a certified software i should rely on for such a problem. What I wonder is: when running on a z/890, shouldn't z/OS detect that the machine has changed from x60 to x70 and re-calculate the RMCTADJC?? Otherwise, you end up with stronger CPs but it seems z/OS does not realize it, so the whole service units calculation (for example, for RMF reports) is wrong... Can anyone explain this behavior?? Thanks a lot, Gil. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
