MP Survived a power cut

Discussion in 'Mac Pro' started by steveOooo, Jan 3, 2012.

  1. steveOooo macrumors 6502a

    Joined:
    Jun 30, 2008
    Location:
    UK
    #1
    LEFT mp in sleep mode, came back, going to wake up 'oh nothing is happening' must of shut down last night? im sure i didnt,

    hit power button and hey presto, everything is back up and running - event FCP etc.. were running when the power outed for 30mins or so (so ive been tolde)

    Just wondering, how did it survive? when you ht sleep, does it take a snapshot of everything and freeze it? like saving your progress in a old 16 bit video game rom running on a emulator (so ive been told of course).

    If the power cut happened when doing something what would happen - in levels of

    1. wordpressing
    2. web browsing
    3. rendering in fcp (ie writting to disc)+ 1 or 2
     
  2. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #2
    I don't think Mac Pro's are setup to do this by default, but there is a sleep/hibernate feature on Intell based Macs. They sleep, keep ram alive, and hibernate, save ram to hard drive. That way if something was to happen, loss of power/battery dies, the ram can be restored from disk. Mac Pro's, like iMacs and Mac Mini's, don't have the hibernate feature on by default. Only the sleep mode. It's possible that you did change the sleep mode at one point to be sleep/hibernate.
     
  3. quatermass macrumors member

    Joined:
    Sep 19, 2009
    #3
    I live in rural Hungary and we have power outages/spikes all the time - and yes, I've got a UPS! Actually just about the best thing I bought, apart from the Mac Pro of course. Sometimes the outage is longer than the UPS can run the Mac for (usually the power only drops out for a couple of seconds) but when it restarts, it's always forgotten what it was doing a reboots from scratch.

    Perhaps it was being in sleep mode - mine never sleeps and is always doing something, 24/7.
     

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