How come I can only burn cd-r at 4x, not 20X

Discussion in 'MacBook Pro' started by mmoran27, Jun 19, 2007.

  1. mmoran27 macrumors 6502

    Oct 23, 2006
    Yesterday I burned a dmg file (200MB) to a cd and I was only given 4X as the fastest speed. I thought the SR MBP is supposed to burn these at 20X?
  2. deadpixels macrumors 6502a

    Oct 30, 2006
    superdrives can burn CD-R's at 24x. maybe the superdrive is adjusting the burning speed according to the quality of the media?
  3. Flyinace2000 macrumors 6502a


    Sep 28, 2004
    My first suspicion would be the media. Also, which softwre are you using to burn? I know when i burn a CD with Toast 8 it tells me both current burn speed and AVERAGE burn speed. I am not sure which one OSX reports while burning. Average speeds is always less since it takes a while for the CD to spin up to "top speed". OR was you laptop plugged in or on battery, could it be a power management setting to conserve power when on battery?
  4. Trepex macrumors 6502a


    Apr 5, 2007
    Ottawa, Canada
    I suspect you are correct. Lots of drives do this based on what they determine the media can handle. Try different media rated for 24x perhaps?

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