Why do CD drives spin up when a flash drive is plugged in?

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  1. Posts : 85
    Windows 7 Home Premium 64bit
       #1

    Why do CD drives spin up when a flash drive is plugged in?


    It's not really annoying, just has bugged me forever. Every single computer I've ever used weather it be Windows 98 through 7, OS X, Ubuntu, laptop or desktop. If you plug a flash drive in the CD drive(s) will spin up to see if their is a CD in them. Why? Lol I can't find anything online saying the reason.
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  2. Posts : 18,415
    windows 7 home 64bit
       #2

    Hi there .. I cannot say i have ever noticed that .. So just tried it on two Laptops no spin at all .. Though that was a DVD/CD drive which i assume you meant
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  3. Posts : 1,045
    Win8/8.1,Win7-U64, Vista U64, uncounted Linux distor's
       #3

    Very strange, I have never experienced that problem. I can see it would be annoying as heck. Just checked my W7, Vista and XP machine, no cd spin up here. These are a combination of IDE. PATA, and SATA optical drives from several manufacturers/oems.

    May have something to do with "auto run" or "auto play" settings.
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  4. Posts : 85
    Windows 7 Home Premium 64bit
    Thread Starter
       #4

    The CD drive light doesn't even flash for any of you guys? This happens on every computer I've had. On my current laptop which is listed in my specs it happens every time, I hear the motor quickly spin up because their is no CD on it to spin, the activity light flashes, and the servo kind of clicks as it moves the laser.
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  5. Posts : 18,415
    windows 7 home 64bit
       #5

    Hi there No do not get any thing at all .. No lights flash no noises
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  6. Posts : 14,606
    Microsoft Windows 7 Home Premium 64-bit 7600
       #6

    i know what you mean, when i plug in a drive or turn the power on my hub then the cd drive gives a little jump start sound.
    thats on a hp pavillion g6 laptop
    it is annoying but only for a millisecon.
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  7. Posts : 85
    Windows 7 Home Premium 64bit
    Thread Starter
       #7

    boohbah said:
    i know what you mean, when i plug in a drive or turn the power on my hub then the cd drive gives a little jump start sound.
    thats on a hp pavillion g6 laptop
    it is annoying but only for a millisecon.
    Yay someone else has this! Haha maybe not yay though. This is a video I took of it, rather boring and simple but you get the idea. Turn the volume up and you can hear the drive.
    http://www.youtube.com/watch?v=u-TtQLADRCM
    Last edited by herqulees; 07 Aug 2013 at 11:23. Reason: Messed up link
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  8. Posts : 7
    Windows 7 HomePremium 32bit
       #8

    Hi There,

    My CD ROM has stopped working. Is it something to do with a missing SM Bus Driver? Can someone help me? I have a Toshiba Satellite series C665 machine with Windows 7 Home Premium 32 Bit in it.

    Thanks in advance
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  9. Posts : 85
    Windows 7 Home Premium 64bit
    Thread Starter
       #9

    muralidg said:
    Hi There,

    My CD ROM has stopped working. Is it something to do with a missing SM Bus Driver? Can someone help me? I have a Toshiba Satellite series C665 machine with Windows 7 Home Premium 32 Bit in it.

    Thanks in advance
    Please no thread hijacking. Make your own thread and ask your question there. https://www.sevenforums.com/newthread...newthread&f=28
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  10. Posts : 572
    Windows 7 Professional x64
       #10

    The answer is actually quite simple. The CD/DVD Drive powers up when "Any" hardware is plugged into a USB port to "Check" for Drivers. Each time a device is plugged in it has to load the drivers before windows can access it, Hence the drive runs up. It used to happen with floppy drives too(actually still does if you find a modern machine with a floppy).
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