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Safe sleep on 2009 iMacs
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 Member Since: Dec 04, 2009
Posts: 1
 
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12-04-2009, 07:24 AM
I'm on the edge of buying a new 2009 21,5' iMac, but I just discovered that one of the features I was more looking forward to, Safe Sleep (the ability to save ram to hd before a stop, so that if there's a power outage while the mac is in stop I won't lose my work), is enabled exclusively on Apple Laptops. I really need this feature and I discovered that it can be enabled on iMacs using a shell command, but I'm not too happy to begin my "Mac life" with an hack.. so, my questions are: 1 is really safe sleep only enabled on laptops by default 2 if I use the hack (sudo pmset -a hibernatemode 3) to get safe sleep on the imac what I risk? 3 what happens if I use the aforementioned hack and then in the future upgrade osx with one of it's "service packs" regularly released by apple? The place where I live has regular power outages during the night and I need the ability to safe sleep my mac, otherwise I would have to shutdown it completely each time... I'd prefer safe sleep over hibernate as safe sleep restores istantly if there isn't a power outage  These may seem stupid questions, but coming from vista where hybrid sleep (microsoft's clone of safe sleep) is available on every hardware I never tought safe sleep would be a laptop only feature  Now I want a mac.. but I NEED safe sleep and I don't want to hack...
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Member Since: May 19, 2009
Location: Western Astraya
Posts: 6,445
 Mac Specs: 13"MBP 2.9Ghz Intel Core i7 10.8.3 ~ iPhone5 6.1.3 ~ iPad Mini 6.1.3 ~ ATV2 5.2.1
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12-04-2009, 09:00 AM
 SafeSleep... Mac OS X 10.4 improved a little-known feature of Mac OS X; in a low-power situation the contents of memory will be saved to the hard drive and the computer will shut down. On other Operating Systems this is a standard feature known as Hibernation or Suspend-to-disk. SafeSleep lets you quickly and easily put your laptop into this sleep mode on demand. I have been using it for several months without any problems. But note that this usage of the functionality is not officially supported by Apple. Hope this helps your situation cheers  Dont forget to use the Reputation System if someone has helped you out !!! “I have absolutely no pleasure in the stimulants in which I sometimes so madly indulge. It has not been in the pursuit of pleasure that I have periled life and reputation and reason. It has been the desperate attempt to escape from torturing memories, from a sense of insupportable loneliness and a dread of some strange impending doom ….”― Edgar Allan Poe |
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Member Since: Mar 30, 2004
Location: USA
Posts: 4,744
Mac Specs: 12" Apple PowerBook G4 (1.5GHz)
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12-04-2009, 09:57 AM
Safe Sleep might help, but it is not a perfect way to prevent damage to your system or loss of data. If you have a desktop and live in an area where power outages are frequent, you need a UPS, no two words about it. |
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 31,974
Mac Specs: 21.5" iMac 2.5 GHz i5, iPad 3rd Gen., 3 iPods
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12-04-2009, 01:27 PM
Buy a good one. Regards. |
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