3,1 SATA link speed Q

Discussion in 'Mac mini' started by adam9c1, Nov 12, 2015.

  1. adam9c1 macrumors 65816

    adam9c1

    Joined:
    May 2, 2012
    Location:
    Chicagoland
    #1
    Picked up a 3,1 Late 2009 Mac Mini Server Edition.
    It has the two 500GB HDs.

    I see Link Speed 3gigabit, however negotiated is 1.5gigabit.
    Are the drives sata1?

    I need to check this same on my other minis.
     
  2. Celerondon macrumors 6502a

    Celerondon

    Joined:
    Oct 17, 2013
    Location:
    Southern Cal
    #2
    Here is some information to get you started.

    Everymac says that your mini Server has a Serial ATA (3 Gb/s) storage connection right here:
    http://www.everymac.com/systems/apple/mac_mini/specs/mac-mini-core-2-duo-2.53-late-2009-server-specs.html

    A 2008 product announcement claims that the Hitachi Travelstar 5K500.B has a 3 Gbps interface right here:
    http://www.itechnews.net/2008/11/13/hitachi-travelstar-5k500b-25-inch-mobile-hdd/

    Perhaps you should check your drive model in System Information - Storage - Media Name:. You may not have this particular 3Gbps drive in your computer. I wonder if that 5400 rpm drive can exceed the 1.5 Gbp/s that your system is reporting?

    My OEM Fusion Drive (FD) components show two different negotiated speeds that are apparently based on the storage media limitations. This SSD negotiated the 6 Gbp/s rate while the HDD only managed a 3 Gbp/s rate.
    FD-SSD.png FD-HDD.png
     
  3. adam9c1 thread starter macrumors 65816

    adam9c1

    Joined:
    May 2, 2012
    Location:
    Chicagoland
    #3
    My other MM 3,1 late 2009 (I removed the opti for a HD carrier) has link and negotiated 3g SSD and 3g 750GB (Apple) drive (originally this drive was from another machine).
     
  4. Celerondon macrumors 6502a

    Celerondon

    Joined:
    Oct 17, 2013
    Location:
    Southern Cal
    #4
    Who made that 750 GB drive for Apple? Here are the media identifiers for this mini.

    Media Names.png

    That "APPLE SSD" is actually a Samsung 128 GB SSD. The "APPLE HDD" below in the disk1s2: position is a HGST (Hitachi) Travelstar 5K1000 5400 rpm HDD.

    You can search by your model numbers to find the specifications for your drives.
     
  5. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #5
    Those drives aren't exceeding 1.5Gb in transfer rates- they're likely under 1Gbps at maximum, so in this case there's no performance penalty. The drives probably are SATA 1, but as mentioned before this post, you can search by the disk's model number to find specifications.
     
  6. MagicBoy macrumors 68040

    MagicBoy

    Joined:
    May 28, 2006
    Location:
    Manchester, UK
    #6
    Yup, even the fastest 2.5" mechanical drives won't saturate the slowest SATA link so it's nothing to worry about.

    SSDs are a different story - the Nvidia MCP79 chipset in these machines is a bit picky about link speeds therefore most current SATA 6Gbps SSDs won't sync above 1.5Gbps.
     
  7. adam9c1 thread starter macrumors 65816

    adam9c1

    Joined:
    May 2, 2012
    Location:
    Chicagoland
    #7
    Some of my 2009's Minis have SSDs in them, and eventually all will.
     

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