Cricual M4 SSD/Optibay/Early 2011 MBP - but 6Gbps??

Discussion in 'MacBook Pro' started by Kristan, Jul 26, 2012.

  1. Kristan macrumors newbie

    Joined:
    Jun 22, 2011
    #1
    Hi,

    I recently decided I needed a bit more space, so got myself an optibay and installed a 256GB Crucial M4 (after putting one in the mrs Blackbook). Foolishly it seems however, as I didn't do my research and I seem to be suffering from the odd stuttering and random beach ball accessing data on the drive in the optibay.

    I checked the firmware and I'm running 000F (apparently not ideal) however looking in system info, I see my Apple SSD in the main bay (CTO option) saying :

    Link Speed: 6 Gigabit
    Negotiated Link Speed: 3 Gigabit

    The crucial M4 however, says :

    Link Speed: 6 Gigabit
    Negotiated Link Speed: 6 Gigabit

    Now I thought the early 2011 MBP's like mine (MacBookPro8,2) only had 3Gbps SATA ports in optical bay, yet mine says it negotiated 6Gbps - or is that the issue? It thinks it's negotiated at 6Gbps but really it's 3?

    And why is the Apple SSD not 6Gbps? Quick xBench says the Apple SSD is indeed slower by a substantial margin in the random read/write, which I completely didn't expect (631.99 for the Apple vs 1218 for the M4).

    Anyone any ideas??
     
  2. AzN1337c0d3r macrumors 6502

    Joined:
    Sep 13, 2010
    #2
    Some Macbook Pro 8,2 had 6 Gbps in optical bay: http://blog.macsales.com/10433-macbook-pro-2011-models-and-sata-3-0-6-0gbs-update-5272011

    That's why you're seeing 6 Gbps on the m4.

    The controller inside the Apple SSD with the 2011 Macbook Pro is only capable of 3 Gbps even though the link is capable of 6 Gbps which is why you're seeing 3 Gbps on your Apple SSD.
     
  3. Kristan thread starter macrumors newbie

    Joined:
    Jun 22, 2011
    #3
    So if I swap the Apple SSD to the optibay and put the M4 in the main bay I should be good?
     
  4. mbpjedi macrumors newbie

    Joined:
    May 17, 2014
    #4
  5. saturnotaku macrumors 68000

    Joined:
    Mar 4, 2013
    #5

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