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AIX LPARs, system time and hardware clock

  • 1.  AIX LPARs, system time and hardware clock

    Posted Wed April 09, 2008 11:40 AM

    Originally posted by: j.gann


    Hi,

    I see that our managed systems' (p595) hw clocks are not set to UTC but to UTC+1. When I activate a newly created LPAR and boot a minimal aix (via nim spot, no xntpd) I see this UTC+1 as AIX system time (checked with "date -u". So far, that is what I expected.

    However, LPARs that have been running for some time (synchronized by xntpd) have their system time right, even after I reactivate the LPAR and reboot without xntpd. That is not what I expected.
    Can anyone explain this? Does the LPAR store its system time between reboots somewhere independent from the hw clock?

    example:
    UTC: 15:00

    lssyscfg -r sys -F name,sys_time
    Server-9119-595-xxxx,04/09/2008 16:00:00

    new LPAR, no xntpd: date -u -> 16:00
    LPAR that has been synced with ntp before, reactivated, rebooted without xntpd: date -u -> 15:00
    Thanks for your input
    Joachim
    #AIX-Forum


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