Muldvarp007

Q: Samsung 850 EVO in Early Macbook Pro

Hi,

 

I had replaced my old hardrive in my Macbook Pro Early 2011 with a samsung 840 EVO, everything worked beautifully until it didnt. In the end i couldent even repair or remformat my drive. So i returned it and got a Samsung 850 EVO instead. In the mean time i put my old HDD back in and everything worked as it should.

 

 

Yeasterday i put the replacement SSD Straigt out of the box into the Mac.,I have been trying for 24 hours now, and im not even able to Format the drive using diskutil not from Recovery Mode or from my OSX Install drive. the Drive shows up in Diskutility and is verified as okay. I finanlly got it formated using the terminal, then the OSX installation failed, tried to repair the disk with diskutillity in recovery Mode, and got a message that the GUID Partitiontable was not working, repaired disk and got the message the disk could not be mounted.

 

 

Is this simply a hardware error with my mac? could it be I need to replace the SATA Cable?

OS X Yosemite (10.10.1)

Posted on Jan 17, 2015 12:36 AM

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Q: Samsung 850 EVO in Early Macbook Pro

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  • by Westah,

    Westah Westah May 22, 2015 2:33 PM in response to SCFRES46
    Level 1 (0 points)
    May 22, 2015 2:33 PM in response to SCFRES46

    My issue was also a bad SATA cable internally. My samsung 850 EVO 250GB worked fine externally thru SATA-USB cable.And I also got all possible errors when having the SSD inside the macbook, couldnt unmount, partition/erase and so on. So I finally went thru with the SATA cable switch. And then it worked!

  • by deliriousy,

    deliriousy deliriousy Jun 29, 2015 4:57 AM in response to Muldvarp007
    Level 1 (0 points)
    Jun 29, 2015 4:57 AM in response to Muldvarp007

    Somehow I had the same problem but was able to fix it. My computer is a 2010 macbook pro running on Mavericks

     

    After cloning my SSD, I installed my 250 gb 850 evo SSD into my macbook pro but it wasn't detecting. Thought the cable was damaged during installation so I reinstalled my old HDD and it worked. I installed my SSD into an external casing and was able to boot up the SSD externally. So I figured that my SSD must be working. I was considering buying a new SATA cable because the impression I got from reading all the forums was that my internal SATA cable was damaged.

     

    I reinstalled the SSD, but this time I held 'option' and it detected my SSD as an internal drive!

     

    My computer was exponentially faster on the internal SSD. For a couple of days, I was turning on my computer by pressing option. Eventually, I mucked around with my settings, went to system preferences, startup disk, clicked on my SSD, and now my computer turns on without holding option.

     

    Hope this helps someone!

  • by daq125,

    daq125 daq125 Jul 2, 2015 4:51 PM in response to Muldvarp007
    Level 1 (0 points)
    Jul 2, 2015 4:51 PM in response to Muldvarp007

    I just put in the ssd 850 evo 500gb to my early 2011 macbook pro. I was able to install it, then from disk utility, format and start restore from time machine (my old HDD died). Everything worked well so I decided to upgrade to Yosemite. That is when things went bad. Started to freeze occasionally at first that I could get out of by closing the program ,then progressively got worse until it froze where I couldn't get it going (all within a few hours). Had grey screen that wouldn't respond until I forced quit. I'm thinking the problem is with Trim. Because you can't have Trim and security both with Yosemite, I went back and was able with several tries to reformat the drive and reinstalled Mavericks then enabled Trim. It has worked fast and without problems so far. I thought the samsung 850 evo  ssd had internal garbage collection with it, but must not work well in Yosemite.

  • by thedunadan,

    thedunadan thedunadan Aug 2, 2015 6:15 PM in response to olePigeon
    Level 1 (0 points)
    Aug 2, 2015 6:15 PM in response to olePigeon

    i just recently installed this ssd in my late-2009 white unibody macbook. i'm only getting 250mb/s read and 200mb/s write speeds as opposed to the advertised 540 read and 520 write. just wondering what speeds you're getting and if there's anything I need to do to optimize performance. 

  • by Jon Horner,

    Jon Horner Jon Horner Aug 5, 2015 6:55 PM in response to thedunadan
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    Aug 5, 2015 6:55 PM in response to thedunadan

    The reason you're not getting the same speeds as the 2011+ macs is because your SSD is running over a SATA II connection instead of SATA III. SATA I is up to 150MB/s, SATA II is up to 300MB/s, and SATA III is up to 600MB/s.

  • by kcjchan,

    kcjchan kcjchan Oct 12, 2015 9:41 PM in response to Muldvarp007
    Level 1 (0 points)
    Oct 12, 2015 9:41 PM in response to Muldvarp007

    So I came here looking for answers as my Macbook Pro 13 (2012) was having problems with exactly the same drive. I'm covered by Apple Care so I sent the computer in for repair. The Genius changed the sata cable and tried with a new drive and that worked perfectly. However, with my 850 EVO it was reporting issues with SMART and would not boot/format/reinstall properly.

     

    I then went to look for SMART utilities to tell me the cause of the error and it appears that there are a huge number of CRC errors, a symptom that seems to point to either a busted cable, bad TRIM, bad SATA controller or a broken drive. The same SSD works perfectly on a Windows notebook so I was beginning to feel that it wasn't a problem with the drive itself.

     

    My final conclusion was that with the old TRIM tool on OSx, it was incompatible with El Capitan and logged a lot of CRC errors on the SSD. This it turn triggered a SMART error which made OSx halt operations on the SSD. Windows seem to be a little more laxed on the SMART check and would continue to run fine on the same SSD that won't run on a Macbook. I'm going to exchange the SSD and see if a new one fixes this.

  • by eyeflaster,

    eyeflaster eyeflaster Dec 3, 2015 6:53 PM in response to olePigeon
    Level 1 (0 points)
    Dec 3, 2015 6:53 PM in response to olePigeon

    The same problem here. Mid 2012 Macbook pro recognizes Samsung EVO 850 but I can't format it (or erase it) - it gives me error:

    "Unable to write to the last block of the device"

     

    There is no firmware update for this SSD, the only thing I can try is to replace sata cable.

    (My old hdd (original) died. So this might be solution)

    Anyone else solved a problem with sata cable?

  • by eyeflaster,

    eyeflaster eyeflaster Dec 8, 2015 6:35 PM in response to eyeflaster
    Level 1 (0 points)
    Dec 8, 2015 6:35 PM in response to eyeflaster

    Replacing SATA cable worked for me. According to this guy (http://youtu.be/hnNA2Dyxe3s ) question mark and a folder means broken sata cable 

  • by djkokalis,

    djkokalis djkokalis Dec 20, 2015 3:59 AM in response to Muldvarp007
    Level 1 (0 points)
    Dec 20, 2015 3:59 AM in response to Muldvarp007

    Yesterday i replaced an ocz ssd of my macbook pro mid 2012 with a samsung evo 850 pro.

    It boots fine. I' am actually writing on it but, i have some problems with writing speed. It starts at full write speed but at next test it fall at half. Please see both screenshots. Can someone explain it?

    ssd.png

    ssd2.png

  • by Taz69,

    Taz69 Taz69 Jan 2, 2016 5:59 PM in response to olePigeon
    Level 1 (8 points)
    Desktops
    Jan 2, 2016 5:59 PM in response to olePigeon

    Hi, I know its been a while, but any chance you can tell me what TRIM enabler you used, I'm using an 850 EVO in a USB3 caddy for my iMac Late 2012 and I'm about to put an OCZ ARC100 into my mid 2009 Macbook Pro, both running Yosemite, not sure yet to upgrade to El Capitan.

     

    Thanks in advance

     

    Mark

  • by maca_lescour_,

    maca_lescour_ maca_lescour_ Jan 3, 2016 3:00 PM in response to Taz69
    Level 1 (12 points)
    Apple Music
    Jan 3, 2016 3:00 PM in response to Taz69

    are you any of you guys running two internal hard drives?

     

    my problem was that the SSD was in the normal slot. I have modified my macbook with a second hard drive that sits in the old cd slot. if you are having problems formatting the SSD it needs to be in the old CD drive slot to be able to format it.

  • by etpapple,

    etpapple etpapple Jan 10, 2016 10:21 PM in response to thereg01
    Level 1 (0 points)
    Jan 10, 2016 10:21 PM in response to thereg01

    How did you go with this? I'm using the same macbook pro and have had an EVO 840 with great success - how'd you go with the 850? keen to know!

  • by djkokalis,

    djkokalis djkokalis Jan 10, 2016 11:54 PM in response to etpapple
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    Jan 10, 2016 11:54 PM in response to etpapple

    Haven't done the trim process. A friend of mine did it and had problems after. Various shutdowns without any reason

  • by withsong,

    withsong withsong Jan 16, 2016 10:24 PM in response to maca_lescour_
    Level 1 (0 points)
    Jan 16, 2016 10:24 PM in response to maca_lescour_

    Hi Maca_lescour

     

    I have the exact same problem with the new 850. I was having odd crashes every now and then, going into the white screen says problems and press any key to restart.... I tried different things including verify and repair disk but the problem keeps coming back. And a few days ago it finally stopped working and stuck at booting screen and that's it... I tried to boot into recovery mode to repair the disk but it said can not be repaired...   my disk is in the primary slot... I don't know what's the problem and what I should do. Have you figured it out yet? Any suggestions? Thank you!

  • by olePigeon,

    olePigeon olePigeon Jan 17, 2016 11:03 AM in response to withsong
    Level 1 (0 points)
    Jan 17, 2016 11:03 AM in response to withsong

    All of my issues with the 850 SSD turned out to be a bad SATA cable.  It appears that the SSD is less tolerant of faulty cables than a regular HDD.  After replacing the SATA cable, it worked fine.

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