NVME Bootable Support without modding ANYTHING sort of....

Discussion in 'Mac Pro' started by calmasacow, Sep 1, 2018.

  1. calmasacow, Sep 1, 2018
    Last edited: Sep 1, 2018

    calmasacow macrumors member

    calmasacow

    Joined:
    Jun 13, 2012
    Location:
    Houston, TX
    #1
    Ok so after looking at all of the voodoo that was being required to make NVME bootable I found a work around and it is super easy with High Sierra. the solution as it turns out is actually pretty cool!

    I bought the LT whatever it is call PCI-e NVME adapter card on amazon and got a Samsung EVO 960 500GB SSD. I couldn't get it to boot I could install to it but I never could get it to boot. After doing some research I found that it wasn't bootable without a lot fo firmware hacking stuff that was WAY more complicated than I was comfortable with. Anyway one of the comments thought sparked an idea. it was about using a SATA SSD to boot because those systems started earlier in the Boot rom before the NVME was active. I Though about it and wondered if I used coreStorage and created a Fusion Drive would it force the loading of the NVME. Well it works!
    I have a 1.5TB fusion drive that is booting and running at the full advertise speeds of the NVME when I test it with BlackMagic Speed Tester

    Just when you boot your USB installer open the terminal and follow the instructions

    https://www.macworld.com/article/2014011/storage-drives/how-to-make-your-own-fusion-drive.html

    Once you have the Fusion drive created click "install new copy of OSX" and select the fusion drive!

    Now I have space and speed!
     
  2. tsialex macrumors 601

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #2
    Yep, Fusion drives will work if you don't want to inject NVMe. It's a know workaround.
     
  3. JedNZ macrumors 6502

    JedNZ

    Joined:
    Dec 6, 2015
    Location:
    Deep South
    #3
    So I'm guessing that a small SSD, like a Samsung 860 Pro 256GB paired with a Samsung 960 EVO NVMe 500Gb would work? If so then that would give me a bit more room for my boot drive.

    Would a generic PCIe M.2 adapter work okay for the NVMe blade (that's what I've currently got), or would I have to go for something more exotic like the LT thing?
     
  4. tsialex macrumors 601

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #4
    Any supported AHCI drive, even an old hard drive, will work to provide boot with a NVMe SSD.

    Remember that with a Fusion drive setup you will double your chances of failure. It's not a secret that even Macs originally configured from factory with Fusion drives fail an leave people in dire straits. So, have a backup.
     
  5. MIKX macrumors 6502a

    MIKX

    Joined:
    Dec 16, 2004
    Location:
    Japan
    #5
    Fusion is Fusion = two drives. . . . . . . NVMe M.2 or SSD booting is NVMe booting = one drive.

    I had Sierra FUSION booting with my NVMe M.2 960 EVO with a USB 3.0 stick doing the ACTUAL BOOTING = TWO drives.

    Now I boot from the same M.2 blade ONLY in High Sierra. = one tiny, very cool, very fast NVMe blade !

    Plus now I have one extra USB port free.

    No pain = no gain.
     
  6. Aiwi macrumors newbie

    Aiwi

    Joined:
    Oct 21, 2010
    #6
    Sounds great! So if I understand you correctly, we just make a

    Fusion Drive consisting of:
    - Simple SATA SSD
    - NVMe M2 SSD

    Install macOS on this and you get both a bootable drive and NVMe speeds (except on a small part of the fusion drive). Plus something that isn't sensitive to EFI/System updates.

    The increased chance of failure surely isn't a big one. It's not mechanical drives we're talking about anyway.

    I can't believe I haven't seen this advice in the Mac Pro Upgrade Sticky..

    Great find!
     
  7. FredF67 macrumors newbie

    Joined:
    Oct 25, 2018
    #8
    I tried it with my Toshiba 1 TB NVMe drive and I couldn't get it to boot. I married it just like the instructions said and when I look at it in Disk Utility , It says it's not bootable. Any suggestions? Help.
     
  8. tsialex macrumors 601

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #9
    Install BootROM 140.0.0.0.0, it has native NVMe support.

    Read posts #1554 and #1569, or wait until Apple releases 10.14.1 this week.
     

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8 September 1, 2018