How to tell if you have MLC or TLC flash iPhone 6/6 Plus

Discussion in 'iPhone' started by MarcusCarpenter, Nov 18, 2014.

  1. MarcusCarpenter, Nov 18, 2014
    Last edited: Nov 18, 2014

    MarcusCarpenter macrumors 6502a

    MarcusCarpenter

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    #1
  2. maka344 macrumors 65816

    maka344

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    #2
    Isn't it the other way round; if you have higher read/write then it's MLC?
     
  3. snsking, Nov 18, 2014
    Last edited: Nov 18, 2014

    snsking macrumors 6502

    snsking

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    #3
    I am getting 197MB/Sec @ write speed
    and 354MB/sec @ read speed

    I assume I have TLC, which is the one that supposedly is having the issues
     
  4. MarcusCarpenter, Nov 18, 2014
    Last edited: Nov 18, 2014

    MarcusCarpenter thread starter macrumors 6502a

    MarcusCarpenter

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    #4
    TLC has a higher write speed than MLC
    http://www.gforgames.com/gadgets/iphone-6-benchmark-tlc-vs-mlc-faster-45791/
     
  5. GoSh4rks macrumors 6502

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    #5
    Like for like, TLC is slower.
     
  6. MarcusCarpenter thread starter macrumors 6502a

    MarcusCarpenter

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    #6
    Seems like TLC can achieve higher write speeds compared to MLC
     

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  7. MarcusCarpenter thread starter macrumors 6502a

    MarcusCarpenter

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    #7
    As you can see in the OP I got 100mb/s indicating MLC flash and not TLC
    Well I have now confirmed I have a MLC 64GB iPhone 6 using this app http://www.pgyer.com/IOKitBrowser

    default-bits-per-cell = 3 is TLC
    default-bits-per-cell = 2 is MLC
    default-bits-per-cell = 1 is SLC
     

    Attached Files:

  8. iososx macrumors 6502a

    iososx

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    #8
    I concur. That's been my personal experience with the many SSD's I've installed over the years in my laptops and those of friends and family.

    Thanks for the link to the App, you've made a very good contribution :D
     
  9. MarcusCarpenter thread starter macrumors 6502a

    MarcusCarpenter

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    #9
    See my post above your last one :)
     
  10. GoSh4rks macrumors 6502

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    #10
    "Like for like" being the key words.

    Parallelism still is a major contributor to speed, and allows for storage devices made of TLC to be faster than devices made of MLC. This does not mean that a single MLC is faster than a single TLC.
     
  11. 0r30 macrumors 6502

    0r30

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    #11
    Iphone 6+ 128gb Verizon Unlocked.

    Used: 35Gb
    Free: 78GB

    Write Speed: 211 mb/sec
    Read Speed: 440 mb/sec

    I killed all my background apps and got

    Write Speed: 247 mb/sec
    Read Speed: 702 mb/sec
     
  12. MarcusCarpenter thread starter macrumors 6502a

    MarcusCarpenter

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    #12
    Yeah you defiantly have TLC flash, you can prove this with the other app I posted a few comments above which will tell you the default-bits-per-cell
     
  13. 0r30 macrumors 6502

    0r30

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    #13
    whats the diff?
     
  14. MarcusCarpenter thread starter macrumors 6502a

    MarcusCarpenter

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    #14
    Apple have recognised a problem with the switch to TLC flash and will be switching back to MLC. Customers with TLC apparently are experiencing some random reboots and Apple have offered to replace any effected device.
    MLC does not have this problem
     
  15. 0r30 macrumors 6502

    0r30

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    #15
    Well that sucks. My phone has been working fine though.
     
  16. cababah, Nov 18, 2014
    Last edited: Nov 18, 2014

    cababah macrumors 68000

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    #16
    iPhone 6+ 128GB

    Used: 30GB
    Free: 83GB

    Write speed: 206MB/s
    Read speed: 349MB/s

    Not sure what this means I have? :confused:

    For the record, I've never had any crashing or rebooting problems (knock on wood) so this is really meaningless. If my phone keeps working and acting stable, I'm not gonna freak out over nothing. Besides, faster read/write speeds can't hurt :)

    Edit: Closed all apps and got the following:

    Write speed: 258MB/s
    Read speed: 764MB/s

    I also verified that I have TLC using this website. It was pretty easy to follow:
    http://www.techgravy.net/check-iphone-6-mlc-tlc-nand-flash-memory/
     
  17. IrishVixen, Nov 18, 2014
    Last edited: Nov 18, 2014

    IrishVixen macrumors 68020

    IrishVixen

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    Jun 20, 2010
    #17
    Not the news I wanted...

    iPhone 6, 64 GB, with crashing issue

    With apps in memory, ran twice. Write speed between 172 - 207 MB/sec
    Closed all apps from memory: 277 MB/sec

    Interesting, that's for sure.

    Edit: since I'm jailbroken with root access, I did some digging in Terminal (basically the equivalent of the second app posted above.) Sure enough, my iPhone 6 delivered from Apple directly just last week has the TLC flash storage.

    I'll wait a bit to see if they eventually come out with either a firmware fix or a publicly declared recall. The phone isn't unusable by any stretch in my case, and exchanging it right now seems silly; odds are, I'd just end up with another one with the same issue.
     
  18. MarcusCarpenter thread starter macrumors 6502a

    MarcusCarpenter

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    #18
    Seems a lot of people got TLC, guess I got lucky.
     
  19. solodogg, Nov 18, 2014
    Last edited: Nov 18, 2014

    solodogg macrumors 6502

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    #19
    i'm with you, MLC iPhone 6 64GB Verizon model. Guess that explains why I haven't had any issues at all thus far. I've got Hynix MLC, you have Toshiba MLC.

    Manufacturer ID AD8260242108 = Hynix
    Manufacturer ID 9800014A1908 = Toshiba
     
  20. JoeyD74 macrumors 6502

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    Oct 31, 2014
    #20
    I'm assuming I have the TLC due to constant reboots and other issues. How can I get my phone replaced with one that has the MLC?
     
  21. haruhiko macrumors 601

    haruhiko

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    Sep 29, 2009
    #21
    My results:

    Write: 171MB/sec
    Read: 296MB/sec

    iPhone 6 Plus Space Grey 128GB
    What does it mean? Do I have TLC or MLC?



    (I got the app for free but this post sounds like an ad for them)
     
  22. iososx macrumors 6502a

    iososx

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    #22
    Well said :)
     
  23. Shadowbech macrumors 601

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    Oct 18, 2011
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    Planet iPhone
    #23
    Verizon 6 + 128 GB.

    Of course I checked, looks like I have the TLC, but this is because I bought it in September, even before Apple decided to switch it to MLC.

    So far (knock on wood), I have not experienced any issue with the rebooting loop, or even crashing and my 6 Plus works perfectly fine. So I'm not that concerned about what is being used for my flash memory. It looks like 8.1.1 fixes most of this issue anyways.

    If it does become an issue then I will simply go and get it replaced but otherwise my phone is working as it is meant to.
     
  24. terminator-jq macrumors regular

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    Nov 25, 2012
    #24
    I'm getting an iPhone tomorrow and I just wanted to confirm the following:

    1. Does this issue only affect 64gb and 128gb models or are the 16gb models also affected? I've been hearing conflicting reports on this. Some places say all iPhone models with TCL are having reboot issues while others say it only affects the larger storage models.

    2. Is this an issue than can be fixed through firmware or does this absolutely require a replacement?
     
  25. MarcusCarpenter thread starter macrumors 6502a

    MarcusCarpenter

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    #25
    MLC Is used in all 16GB models, 64GB seem to use both MLC and TLC Im not sure if the 128GB version uses MLC at all
     

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