7 Replies Latest reply: Feb 14, 2009 4:45 AM by machoo
Øivind Idsø Level 1 (80 points)
I have a MacBook Pro (bought this summer, the early 2008 model) with a strange problem.

When importing CDs using iTunes I experience very different import speeds, depending on which CD I import.

Just ten minutes ago I imported a CD and got speeds of around 18x-19x, which is impressive.

However, the next minute the speed only reaches about 6x-10x. I have even had CDs import at just 4x-5x. I can't find any pattern, and all the CDs look fine (little or no scratches etc.).

Any idea why this happens? Could it be a hardware semi-failure?

Is there a way to diagnose this problem?

MacBook 2GHz, MacBook Pro 2.4GHz, Mac OS X (10.5.6), Nope.
  • neuroanatomist Level 7 (31,690 points)
    Not sure this is a problem. Always been this way, on my MBP and on PBs before that. Read speed varies dynamically.
  • Øivind Idsø Level 1 (80 points)
    That's strange. I can understand that speeds vary dynamically from beginning to end during import, but I don't get why it would do so from cd to cd. Why should it?

    It was never like this with my old Power Mac G5.
  • neuroanatomist Level 7 (31,690 points)
    Disc quality, a light smudge on a disc, etc. The ultra-thin optical drives in Apple portables are pretty sensitive to variations in discs.
  • Øivind Idsø Level 1 (80 points)
    Ok, thanks. Guess I'll settle for the variations in speed.

    Variation is the spice of life, after all.
  • machoo Level 1 (0 points)
    Do your imports ever stop completely? I have a very difficult time importing CDs. Like you, I sometimes get very fast imports and other times the imports crawl, stop completely, and I must force quit iTunes in order to get the CD out.
  • Øivind Idsø Level 1 (80 points)
    No, my imports never stopped completely - until recently, that is.

    My Superdrive went to pieces (not literally, although it sounded like that when I tried to import some of my CDs), and it's just been exchanged.

    Speeds now fluctuate between about 10x to as high as 22x. I can find no pattern, as brand new CDs that have just been unwrapped are as likely to reach 10x as 22x, while three-four year old CDs can be imported at 22x.

    Btw, I've imported quite a few CDs on my two year old MacBook, and for some reason speed is 100% consistent (reaching about 10x at the end of the import). This is all very strange.

    In any case, I'm thinking your drive might be broken.
  • machoo Level 1 (0 points)
    Thanks so much for your advice. I will go and have it checked out.

    Like you, I have an early summer 2008 MacBook Pro. Perhaps I will inquire as to the reason for such fluctuation in speed.