What's your Power Recovery Count in Trim Enabler?

Discussion in 'MacBook Pro' started by AeroZ, Nov 4, 2013.

  1. AeroZ macrumors 6502


    Aug 7, 2013

    I'm curious of your Power (POR) Recovery Count in Trim Enabler (it's under smart status).
    I got a Samsung 840 SSD and it's growing each time I put my mac to sleep. If I shut down or restart then it doesn't increase.
    Maybe I'm not the only one :confused:

    If anybody got some additional info on why POR count is increasing then let us/me know.

    Thanks for your input!
  2. kondi, Dec 7, 2013
    Last edited: Dec 7, 2013

    kondi macrumors newbie

    Dec 7, 2013
    Sorry guys I'm new here and not exactly sure what is the policy on bumping old threads but I couldn't find any other thread on this topic.

    Anyways, I have exactly the same problem as the OP with the same Samsung SSD model.

    According to Samsung POR (power) recovery count value in S.M.A.R.T increases if an unexpected power failure occurs or an unsafe shutdown of the computer. But every time the mac goes to sleep mode the Por recovery count keeps going up. Just like the OP is experiencing shutting down or restarting doesn't increase the value. It is worth mentioning I had this hard drive on a Windows 8 machine and the behavior was similar but opposite in fact; Sleep mode was fine and shutdown or restart would make it go up.

    I'm curious to know if this is normal behavior or we both have faulty ssd's.
  3. JerzyKoziol macrumors newbie

    Apr 8, 2014

    So - what about your SSDs? Is the Power (POR) Recovery Count still increase?
    I have exactly the same problem - and it is also a Samsung 840 Evo SSD!
    I'm a M$ user so my SSD's behavior is exactly the same as AeroZ described. Sleep is fine but Shutdown or Restart add +1 to POR Recovery Count every time.
    Currently I have 25 Power-on Counts and 24 POR Recovery Counts! Every time I shutdown/restart my notebook the number increases.
    I wonder what to do with that! How did you managed the problem? Was that faulty drives? Or the problem still exists?
    I have a double problem because I've got a new notebook and a new SSD - so I can't definitely point the suspected hardware. It may be notebook as well as faulty SSD.
    But - you tell it also happens on a Mac! So it seems to be system independent.
    Moreover - I have 2 SSD's in my notebook. 1.5 y/o Samsung 830 and the new Samsung 840 Evo. While the POR Recovery Count increases after every shutdown for the 840Evo drive - the second SSD (830) is perfectly fine!
    It has several POR Recovery Counts but it's 1.5 years old and I made several hard boot or power loses through this time so I am not surprised.
    The most important is that it doesn't increase on Samsung 830.
    Gathering all the information I suspect faulty 840Evo but I am not sure.
    I can try to put it into another notebook and check it's behavior.
    I can also try to replace both SSD in their bays and put A->B and B->A (I have two hdd connectors in my notebook).
    I will do that in the meantime.
    If you guys found anything new on this subject please post some info - thank you!
  4. Mr. Retrofire macrumors 603

    Mr. Retrofire

    Mar 2, 2010
    That's no problem. It is a S.M.A.R.T. attribute, which is only useful for technicians. Some firmware versions and drives support this attribute, and some do not support this attribute.
  5. JerzyKoziol, Apr 8, 2014
    Last edited: Apr 8, 2014

    JerzyKoziol macrumors newbie

    Apr 8, 2014
    Yes I know but such information sometimes becomes very important to the end user and many people use it to determine whether their hardware works properly.
    I am not a fan of such frequent diagnostics :) - but when I buy new hardware I always check it. It's an SSD in this case and this is extremely important for me. I don't care of my notebook as much as I care of the data stored on the disk. For a couple of years I use only a notebook and I don't want another PC's at home, at work. Just one computer for everything and everywhere. So there is a lot of very important data for me - home, family and business. Of course I back it up frequently but not everyday - it's not a server! But I don't want the data to become corrupted or lost a week of work.

    Nevertheless I've made my first check - I put SSD from bay A to bay B and vice versa.
    Huh.... POR Recovery Count stopped.... I have made several shutdowns and it works like a charm... Shutdowns are counted - but properly, without any unnecessary interrupts shown in SMART. Power-on Count is now 35 and POR Recovery Count stopped at 28. Before Power-on Count was always 1 ahead of POR.
    That may seem to resolve the problem but I will check other options e.g. putting the 840Evo into another notebook.

    Apart from that I suspect I put the disks into wrong bays. I am not sure at this moment because I have to open the cover once again and check it but it may be related to the fact that the first SSD with OS should be mounted in the first bay, and the second (storage) in the secondary bay.
    Long time ago it was important with ATA drives .... I even didn't think of it nowadays with "SATA-AHCI-GPT-SSD" damn super modern disks!
    It looks like I should refresh some knowledge from good old times ...

    Well it's funny but the OS disk (Samsung 830) is in the secondary bay and the "data" disk (Samsung 840Evo) is in the first primary bay - and this is the configuration which doesn't provide errors on the 840Evo.
    I will stick with it for a while and check if that's OK. If there's no more POR Recovery Count errors for the 840Evo I will retain the configuration and assume it as a solution to my problem.
    I don't know how to help other users - if you have 2 disk bays, try the other one. If not - maybe it's a BIOS function... some kind of energy saving stuff. I have 1 or 2 settings related to energy saving but I didn't touch it. And finally comes the Win8 OS - maybe there is a bug which causes such SSD behavior but I doubt it because as some users wrote before - it happens also on MacOS.
    And maybe it's a bug inside Samsung firmware which will be repaired in future firmware versions.
    Anyway swapping the SSD disks helped in my configuration so I keep it working.

    Sometimes I envy you Mac users that you don't have such problems arising around M$ systems :). I am a big fan of iOS devices and I don't realize living without iPhone and iPad - but I've been using M$ PCs for decades and I am unable to leave this platform for Apple. That's a pity but life goes on...
  6. simonsi macrumors 601


    Jan 3, 2014
    So just to be clear, you only have the problem on a Win laptop? You have no MacBook Pro-relevant problem?
  7. JerzyKoziol macrumors newbie

    Apr 8, 2014
    No, I don't have Mac relevant problem - only win notebook. I wouldn't of course describe the problem on a Mac related forum :) - but I was looking for articles, posts describing exactly my problem and AeroZ and kondi's posts match this. AeroZ had a Mac related problem, while kondi mentioned both - Mac and Win.
    So it seems the problem is related to both platforms.
    I suspect it's the Samsung ssd's firmware bug then.
  8. laurihoefs macrumors 6502a


    Mar 1, 2013
    Sounds like your problems are pretty much opposite.

    Anyway, check that you have the newest firmware version in use, and only trust the info Samsungs own software (SSD Magician) tells you. Many S.M.A.R.T. attributes are standardized, but some are vendor specific, and this may lead to some third party software (HD Tune, I'm looking at you!) to misinterpret some of those attributes, and raise false alarms.
  9. JerzyKoziol macrumors newbie

    Apr 8, 2014
    laurihoefs - read another posts...

  10. laurihoefs macrumors 6502a


    Mar 1, 2013
    Yes, I read them.

    Did you update to the latest firmware? Did you use Samsung SSD Magician to check the drive, and not a third party software like CrystalDisk Info or HD Tune?
  11. JerzyKoziol macrumors newbie

    Apr 8, 2014
    Of course. The first thing I did was firmware update via Samsung Magician.
    To tell you the truth I am not sure whter it was a good idea.
    The ssd power on counts was still +1 than POR errors. I don't remember but I probably made one restart and then updated the firmware. So it makes +1 power-on made when the factory firmware was installed. Maybe there were no POR error at the first restart under factory firmware?......
    First two posts here describe samsung 840. They didn't say which model - older 840 or 840 Evo. However I say - this is samsung's ssd problem.
    I spent a lot of time looking for this error on the web - and found a couple of interesting articles/posts but this error seems to be almost unseen. AeroZ and kondi here were the first I've found describing exactly the same situation as mine. So it doesn't matter Mac or Win, Samsung has a problem in both cases.

    I have resolved the problem by swapping the SSDs in bays. It seems that 840Evo "feels" better when mounted in the primary bay. That's all.

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