GoFlex speed fluctuation

Discussion in 'Mac Accessories' started by Mr Dobey, Sep 16, 2012.

  1. Mr Dobey macrumors 6502

    Joined:
    Aug 8, 2008
    #1
    GoFlex Thin USB 3.0 to Retina MacBook Pro. Formated as Mac OS Extended (Journaled)

    Why would the read speed fluctuate so consistently?
     

    Attached Files:

  2. carestudio macrumors 6502

    Joined:
    Aug 6, 2008
    #2
    does the spotlight index the files on the background?
     
  3. Mr Dobey thread starter macrumors 6502

    Joined:
    Aug 8, 2008
    #3
    I would think indexing would go on after the file has been completely transferred. But I did try to check by transferring another file. As I remember in previous Mac OS' you would click on the top right hand corner magnifying glass to see when indexing was happening. I don't see anything under 10.8.2. Do you know how to check?
     
  4. quasinormal macrumors 6502a

    Joined:
    Oct 26, 2007
    Location:
    Sydney, Australia.
    #4
    I get a consistent 48 MB/s using a Goflex attached to both FireWire and Thunderbolt.
     
  5. Mr Dobey thread starter macrumors 6502

    Joined:
    Aug 8, 2008
    #5
    Do you have an SSD in your computer?
     
  6. quasinormal macrumors 6502a

    Joined:
    Oct 26, 2007
    Location:
    Sydney, Australia.
    #6
    A 512gb Samsung 830 in a 15" early 2011 and a 5400rpm 750gb in a 13" early 2011. I just remembered I was copying to another Samsung 512gb via a goflex fw800 adapter for the 13" 48MB a sec reading. Backing files up from a fw800 goflex to thunderbolt 2.5" goflex ( both 1.5TB) I still get a consistent 48MB a sec.
     
  7. Mr Dobey thread starter macrumors 6502

    Joined:
    Aug 8, 2008
    #7
    If you're getting a constant speed I wonder if it has to do with the USB 3.0 controller in the GoFlex Thin.
     
  8. carestudio macrumors 6502

    Joined:
    Aug 6, 2008
    #8
    how full is your drive now? I guess it's just a slower drive (hard disk) when it gets full. I am still awaiting for CalDigit T1 SSD thunderbolt drives that can reach 470MB/s , the regular drive would not get you sustain data rate while it gets full or over some % of usage.
     
  9. sjinsjca macrumors 68000

    sjinsjca

    Joined:
    Oct 30, 2008
    #9

    Buffering behavior. Pipe is faster than the mechanical drive.
     
  10. Mr Dobey thread starter macrumors 6502

    Joined:
    Aug 8, 2008
    #10
    Brilliant.
     
  11. Mr Dobey thread starter macrumors 6502

    Joined:
    Aug 8, 2008
    #11
    I get the same fluctuation with my USB 2.0 Blu-Ray drive.
    In my case it's the drive's 4x (144Mb/s) read speed.

    Looks like this behavior is common as I read here.
    vhttp://www.tomshardware.com/reviews/external-blu-ray-burner,2999-10.html
     

    Attached Files:

Share This Page