Confuse about sata 6gb external HDD

Discussion in 'Mac Pro' started by carambo, Oct 30, 2011.

  1. carambo macrumors member

    Joined:
    Aug 29, 2009
    #1
  2. AdrianK, Oct 30, 2011
    Last edited: Oct 30, 2011

    AdrianK macrumors 68020

    Joined:
    Feb 19, 2011
    #2
    EDIT: never mind, I missed the point of the question.
     
  3. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #3
    SATA connectors used in external enclosures are just electrical contacts (wire), not active circuits.

    So it will pass 1.5Gb/s, 3.0Gb/s, or 6.0Gb/s, depending on the slowest link in the chain (drive or SATA controller it's attached to). But if both the disk and card are capable of negotiating 6.0Mb/s, that's what they'll connect at.

    Keep in mind, with 6.0Gb/s, mechanical disks cannot come close to saturating it (can't even saturate 3.0Gb/s), so it's really suited to recent SSD's which can exceed 3.0Gb/s throughputs.
     
  4. carambo thread starter macrumors member

    Joined:
    Aug 29, 2009
    #4
    Ok, understood, thanks for your help
     
  5. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #5
    :cool: NP. Glad it helped. :)
     

Share This Page