iMac External SSD Slow Boot Time

Discussion in 'iMac' started by andrew5494, Nov 15, 2016.

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  1. andrew5494, Nov 15, 2016
    Last edited: Nov 16, 2016

    andrew5494 macrumors regular

    andrew5494

    Joined:
    Jan 22, 2015
    Location:
    Toronto / The 6
    #1
    Hi everyone I just bought the Crucial MX300 525GB SSD for my iMac, hooked it up with a USB3 to SATA3 adapter and made it my startup disk.
    I thought the boot time would be a huge difference like you see in all of those YouTube videos but it wasn't.
    What do you guys think?
    Also does anyone know why it flashes like that mid boot?

    Screen Shot 2016-11-15 at 7.15.41 PM.png

    DiskSpeedTest.png
     
  2. MacUser2525 macrumors 68000

    MacUser2525

    Joined:
    Mar 17, 2007
    Location:
    Canada
    #2
    Mid boot flash is when the graphics finally load in the boot up process, if you were to use a verbose boot so you only seen text at the start you would see the switch over when it happened there. Does not seem any slower than mine when I boot with external SSD to clone from main install to spare machine to keep both identical.
     
  3. andrew5494 thread starter macrumors regular

    andrew5494

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    Toronto / The 6
    #3
    Thanks a lot for the info!
    Very interesting.
     
  4. I Need a Drink macrumors regular

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    Oct 14, 2013
    #4
    I might be wrong here, but using a USB to Sata cable is probably limiting your speed. If you use an enclosure that supports UASP that would probably increase the speed you get over USB3. Again, I might be wrong on that.
     
  5. andrew5494, Nov 15, 2016
    Last edited: Nov 15, 2016

    andrew5494 thread starter macrumors regular

    andrew5494

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    #5
  6. DeltaMac macrumors G3

    DeltaMac

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  7. Orbsandoz, Nov 15, 2016
    Last edited: Nov 15, 2016

    Orbsandoz macrumors newbie

    Joined:
    Feb 16, 2016
    #7
    My OS is on a bare drive SSD in a Seagate Thunderbolt dock hooked up to an Elgato Thunderbolt 2 dock hooked up to my iMac's Thunderbolt 1 dock.... My Mid 2011 iMac now runs as fast as my early 2011 15" MacBook Pro with a ssd drive and without having to open it up! I have encountered no random disconnects of the OS and and I also get to enjoy the benefits of USB 3.0 via the Elgato dock.... Not a perfect solution but one that has brought new life into my old workhorse! Granted I bought the Seagate Thunderbolt Dock at a Pawn Shop for $10 on clearance, since they had it listed as a modem. The Elgato dock I bought used on eBay for $80.... I could have just opened up my iMac and installed a ssd but I would not have enjoyed the benefits of what Thunderbolt provides! I am really happy and have had no issues in the seven months since I made the switch. Just my 2 cents and I would appreciate anyones feedback on my choices!
     
  8. Fishrrman macrumors G5

    Fishrrman

    Joined:
    Feb 20, 2009
    #8
    I watched your video and frankly, I don't find that bootable time to be overly "slow". It did seem to take more time to "find" the boot drive.

    Have you gone to the Startup Disk pref pane, and selected the external SSD to be the boot drive?

    Of course, it's not going to equal the boot speed of a new MacBook Pro with the PCI-e based flash SSD's, nor one of the new iMacs with a similar drive, either.

    Please run the BlackMagic Speed tester utility, and post the results here.
    The important number is the "read" speed.
    With a USB3/SATA setup, the optimum is going to be around 435mbps.

    Regarding the "flash" -- I sense that has to do with a graphics file or setting being initialized. Nothing to worry about. It's "just there".
     
  9. antonypg macrumors member

    Joined:
    May 8, 2008
    #9
    As an experiment I built myself an external Fusion drive using an SSD in a Thunderbolt case and a spinning hard drive in a USB 3 case. I just checked and booting my MacBook 2011 took 25 seconds from the moment I hit the power button to the login prompt showing up.
     
  10. andrew5494 thread starter macrumors regular

    andrew5494

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    Jan 22, 2015
    Location:
    Toronto / The 6
    #10
    @DeltaMac @Fishrrman
    Just posted my results. Thanks!
    --- Post Merged, Nov 16, 2016 ---
    So shouldn't mine be faster then if its a Late 2012 iMac?
    Guess it depends on the specs of the computer and the SSD.
     
  11. antonypg macrumors member

    Joined:
    May 8, 2008
    #11
    My external Fusion takes 25 seconds to boot, but it only contains a fresh copy of Sierra. My internal SSD takes 40 seconds, but it is encrypted and has loads of other utilities/applications installed.
     

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