Resolved Install 3 hard drives on iMac 2011 27" FAILED ...

Discussion in 'iMac' started by yashiharu, Jan 20, 2019.

  1. yashiharu, Jan 20, 2019
    Last edited: Jan 20, 2019

    yashiharu macrumors newbie

    Joined:
    Aug 30, 2012
    #1
    iMac2011.jpg

    Before that, I am running MacOS on external TB SSD and internally a 256gb SSD (Bootcamp) & 3.5" WD 4T Re without any problem

    Today, I got the 13pin SATA power splitter cable and install all 3 hard drives into the iMac.

    MacOS SSD uses SATA 0
    BootCamp SSD uses SATA 1 (share power to HDD)
    4T HDD uses SATA 2 (get shared power from Bootcamp SSD)

    That 4T HDD never detect in MacOS, the system shows no device connected to that SataII port

    then I tried swap power cable & SATA cable with Bootcamp, same results - 4T is missing

    Anyone got it works?
    --- Post Merged, Jan 20, 2019 ---
    it's sad ...
    I love this iMac so much

    What my plan is: internal MacSSD, WinSSD, Data + external SSD1 for photo & SSD2 for work ...
    Can't even go through this step, not to mention I already got an eGPU set ...
     
  2. RyanXM macrumors regular

    RyanXM

    Joined:
    Jul 7, 2012
    Location:
    DFW, TX
    #2
    There are three power headers on the 27" Mid 2011 iMac (HDD PWR, SSD PWR, and ODD PWR). If you are going to share power, I would have the HDD on its own power header and then split the power coming from the SSD or ODD PWR header.
     
  3. yashiharu thread starter macrumors newbie

    Joined:
    Aug 30, 2012
    #3
    Isn't SSD consumed more power than HDD?
    ODD PWR is lowest and not enough to power up SSD/HDD, right?

    So what you mean is:
    SATA1 data <> SSDMac
    SATA1 PWR (shared) <> SSDMac PWR

    SATA1 PWR(shared) <> SSDWin PWR
    SATA2ODD data <> SSDWin

    SATA0 data <> HDD
    SATA0 PWR <> HDD PWR

    correct?
     
  4. yashiharu thread starter macrumors newbie

    Joined:
    Aug 30, 2012
    #4
    it works!!

    HDD @6G
    SSDMac @6G
    SSDWin @3G

    everything works very nicely.
    GPU temperature drops after cleaning all the fans

    SSDs placed side by side vertically for best GPU heatsink cooling (i mean L & R)

    sensor problems solved by MacFanControll perfectly

    Now, I can move on to the next big thing - eGPU!

    thanks @RyanXM
     
  5. tpluth macrumors member

    Joined:
    Sep 24, 2014
    Location:
    Carmichael, CA
    #5
    I would try to rearrange it so the HDD is on SATA1 (3G). The SSD's can take advantage of the 6G speed. The HDD can't, really.
     
  6. yashiharu thread starter macrumors newbie

    Joined:
    Aug 30, 2012
    #6
    oh. I am so stupid ...

    I should mix the use of PWR and data cable ...

    Let me change them later when I upgrade to wifi AC & BT4.2 card
     
  7. RyanXM macrumors regular

    RyanXM

    Joined:
    Jul 7, 2012
    Location:
    DFW, TX
    #7
    Glad you got it working! SSDs use less power during use than a HDD, especially newer ones.
     

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