Problems with booting Apple SSUBX SSD on PCIe adapter

Discussion in 'Mac Pro' started by MisterAndrew, May 14, 2017.

  1. MisterAndrew, May 14, 2017
    Last edited: May 14, 2017

    MisterAndrew macrumors 6502

    MisterAndrew

    Joined:
    Sep 15, 2015
    Location:
    Portland, Oregon
    #1
    Hello,

    I'm having some issues with booting my Mac Pro 5,1 from an Apple SSUBX SSD installed in a PCIe adapter. The SSD is Apple part # MZ-JPV2560/0A4 (655-1858H) and the PCIe adapter is this one: http://r.ebay.com/klbBjL.

    I have it installed in slot 4. When I boot after the chime is goes to the white/gray screen and hangs there for about 1 minute. Then it proceeds to boot as normal. When it's up and running it works fine and the speed test is good. But the hang up at the boot is annoying.

    I put it in slot 3 and when it's done hanging it just flashes the missing folder symbol. If I restart it holding the option key to select the boot drive that will come up and I can select it and it boots normally. I went into system preferences and made sure the drive is selected as the start up disk. But when I restart it does the same thing with the missing folder symbol. So that seems really strange. I put it back in slot 4 and it just has the hang up and boots normally again. I haven't tried putting it in slot 2.

    I've reset the PRAM, even 3 times in a row and it didn't change anything. But the computer wouldn't boot after I did the reset. It just had a black screen. I had to turn it off and unplug everything before it would boot again. Is that normal?

    Is there a way to tell if the SSD is good? I did a SMART test and that checks out without errors. I've also ran the Apple Hardware Test and it found no errors. Without purchasing another SSD, is there a way to tell if the adapter isn't good? I would prefer not to send the SSD back if it's good.
    --- Post Merged, May 14, 2017 ---
    I put it in slot 2 and it does not hang on boot. Is it normal for PCIe SSDs to act up in slots 3 and 4?
    --- Post Merged, May 14, 2017 ---
    So now I have a different problem. The speed test shows it's operating at half speed in slot 2.
     
  2. MisterAndrew thread starter macrumors 6502

    MisterAndrew

    Joined:
    Sep 15, 2015
    Location:
    Portland, Oregon
    #2
    I'm pretty sure it's an issue with the adapter, but what can you expect for $4? :)

    If I was able to install a driver for the adapter chipset would that help it run in PCIe 2.0 mode in slot 2? Or it would it need some kind of EFI modification?
     
  3. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #3
    There is no chip set on the adaptor. It is pretty much really just an adaptor, not a convertor. No chipset required to convert anything, but allow some direct connection between the PCIe slots and the PCIe SSD's connector.

    Anyway, that half speed issue is a known bug. No fix yet.
     
  4. MisterAndrew thread starter macrumors 6502

    MisterAndrew

    Joined:
    Sep 15, 2015
    Location:
    Portland, Oregon
    #4
    Hmm, okay. Thank you. Hopefully there'll be a fix soon. :)
     

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