SATA vs. SATA 2

Discussion in 'Mac Pro' started by Rokeneer, Jan 7, 2012.

  1. Rokeneer macrumors regular

    Joined:
    Sep 27, 2011
    #1
    What is the difference between SATA and SATA 2?

    Will both work in my 2006 Mac Pro?
     
  2. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #2
    About 1.5Gbit/sec speed. They will both work in your Mac Pro, but try to get SATA 2 drives, they're faster.
     
  3. derbothaus macrumors 601

    derbothaus

    Joined:
    Jul 17, 2010
    #3
    SATAI = 1.5Gb/s
    SATAII = 3.0Gb/s
    SATAIII = 6.0Gb/s

    A single HDD can't get to 150MB/s sustained yet. SSD's can saturate their respective links.
     
  4. jmcgeejr macrumors 6502

    jmcgeejr

    Joined:
    Oct 7, 2010
    Location:
    Seattle, WA
    #4
    As stated above.
    An ssd can saturate a SATA2 connection and below easily as Sata2 is 3Gbps which is roughly 375MB/s. No single mechanical drive can saturate a single bus right now, nor can I see that changing in the near future.
     
  5. derbothaus macrumors 601

    derbothaus

    Joined:
    Jul 17, 2010
    #5
    And also adding a Sandforce SATAIII SSD can saturate a 6.0Gb single bus. 560MB/s is pretty close to full saturation forgiving any overhead.
     
  6. jmcgeejr macrumors 6502

    jmcgeejr

    Joined:
    Oct 7, 2010
    Location:
    Seattle, WA
    #6
    I am going to disagree on that one :), since sata 3 is 6Gbps which is about 750MB/s, and from reading, the overhead is about 10% at worse so 7MB/s :)
     
  7. derbothaus macrumors 601

    derbothaus

    Joined:
    Jul 17, 2010
    #7
    True man. Can't argue with correct math. But with 10% overhead (worse case) theoretical is maxed at 691MB/s. So we have a good 140MB/s to go:D
     

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