The pcie nvme ssd dorsn't work for my cMP

Discussion in 'Mac Pro' started by zen94, May 17, 2018.

  1. zen94 macrumors newbie

    zen94

    Joined:
    May 4, 2018
    #1
    Hey guys, I just fixed my cMP by replacing a new backplane and using it with HDD for a few days, but herr comes another issue.
    I got my nvme to pcie slot adapter, when I trying to install the system(high sierra) with my sm951, it does't finish the whole process of installing, the computer will shut donw and restart when the progress bar at about 70-80%. So I can't get into the system now...If I unplug the install driver and just wait for booting, there will be a folder with question mark.
    Anyone knows how to fix this? As far as I know the high sierra should support nvme officially...
    --- Post Merged, May 17, 2018 ---
    Oh fxxk, my bad...
    Seems nvme is not bootalbe for cMP, I need a ahci one...
     
  2. h9826790 macrumors G4

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    Get a small cheap SATA SSD, install that into the optical bay. Merge the SATA SSD and NVMe into a Fusion Drive, then your NVMe Fusion drive now will be bootable.
     
  3. zen94 thread starter macrumors newbie

    zen94

    Joined:
    May 4, 2018
    #3
    Sorry I've never heard that before, how to merge these two ssds? Is it a hardware thing or software? I actually ordered a 1.6t intel s3610 ssd on Taobao, but it might takes 1 to 2 weeks to get here.
    --- Post Merged, May 17, 2018 ---
    And why do I have to put it into the optical bay?
     
  4. bsbeamer macrumors 68000

    Joined:
    Sep 19, 2012
    #4
    Optical bay is often the easiest connection for adding a spare drive, especially if filling out the four SATA slots. Sometimes can get slightly increased speeds over the SATA slots, but not as drastic as PCIe SSD.

    This post is basically step-by-step to setup a Fusion Drive:
    https://www.macworld.com/article/2014011/storage-drives/how-to-make-your-own-fusion-drive.html

    This link may also be helpful for Fusion Drives stuck with APFS (not recommended):
    https://beta.apple.com/sp/betaprogram/apfsfusion
     
  5. zen94 thread starter macrumors newbie

    zen94

    Joined:
    May 4, 2018
    #5
    Yes, Done now with my sm951 and a 4t hdd, thanks mate!
    Will do another Fusion drive when my s3610 arrive, kind of a interesting technology :D
    The speed now:
     

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  6. CreatePro macrumors newbie

    CreatePro

    Joined:
    Feb 19, 2014
    Location:
    UK
    #6
    Which slot do you have the SM951 in? if you install it in a 16x slot it will only run at half speed. In slot's 3 & 4 should around 1,500MB/s
     
  7. zen94 thread starter macrumors newbie

    zen94

    Joined:
    May 4, 2018
    #7
    It's in the slot close to the graphic card, I think it's acceptable since it is linked with a HDD now, you think the performance should be higher?
     
  8. bsbeamer macrumors 68000

    Joined:
    Sep 19, 2012
    #8
    If you do not NEED higher speeds, might be easiest not to mess with it right now. You likely would be able to achieve higher speeds moving it up a slot. Really depends on what you have connected to your system and the bandwidth needs of the other PCIe cards. Might not make sense moving depending on those requirements.
     
  9. zen94 thread starter macrumors newbie

    zen94

    Joined:
    May 4, 2018
    #9
    Oh great, the speed do increased!
    It's 12xx/15xx now.
    I thought the two slot at the bottom will be x16...
     
  10. flowrider macrumors 603

    flowrider

    Joined:
    Nov 23, 2012
    #10
    ^^^^Please, PLEASE use the search function and do some reading. All your questions and the problems you have been experiencing have been explored in the past on these forums and ALL your answers are readily available.

    Lou
     
  11. zen94 thread starter macrumors newbie

    zen94

    Joined:
    May 4, 2018
    #11
    Sorry my bad, I used to post it first then start searching...
     

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