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Windows 7: Why do CD drives spin up when a flash drive is plugged in?

07 Aug 2013   #11
herqulees

Windows 7 Home Premium 64bit
 
 

Quote   Quote: Originally Posted by mohavepc View Post
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).
But their is no reason that the CD drive should be waking up for something that has nothing to do with it, it's driver(s) are loaded at boot and stay loaded forever since it's a permanent part of the OS. Stuff like flash drives use the user mode driver framework, a whole different system separate from the main parts of the computer.


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07 Aug 2013   #12
mohavepc

Windows 7 Professional x64
 
 

It is part of the routine. MS built this into the os to be able to load driver via a dc/dvd. lets say you get a new usb device that has no windows drivers preloaded and you have no internet access. You do have the installation cd. it stands to reason that if you insert the cd then plug in the usb device windows will automatically look to the cd for drivers. it is how it is programed. even in Win8 the cd/dvd will cycle when a new device or even an already installed device is plugged in. if drivers are not readily available windows will automatically look to floppy/cd/dvd.

it's not the cd/dvd drivers windows is looking for.
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07 Aug 2013   #13
herqulees

Windows 7 Home Premium 64bit
 
 

Quote   Quote: Originally Posted by mohavepc View Post
It is part of the routine. MS built this into the os to be able to load driver via a dc/dvd. lets say you get a new usb device that has no windows drivers preloaded and you have no internet access. You do have the installation cd. it stands to reason that if you insert the cd then plug in the usb device windows will automatically look to the cd for drivers. it is how it is programed. even in Win8 the cd/dvd will cycle when a new device or even an already installed device is plugged in. if drivers are not readily available windows will automatically look to floppy/cd/dvd.

it's not the cd/dvd drivers windows is looking for.
So any idea how to disable it? CDs/DVDs are pretty much an outdated technology and thus I rarely use the drive and disabled it for now, but I'd like to fix this instead of just avoid it like that.
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07 Aug 2013   #14
mohavepc

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by herqulees View Post

So any idea how to disable it? CDs/DVDs are pretty much an outdated technology and thus I rarely use the drive and disabled it for now, but I'd like to fix this instead of just avoid it like that.
short of modifying the inf files involved with the driver install feature of windows the only solution that I am able to offer is to turn of auto installation of drivers. This could lead to issues later on however as windows will then prompt you as to what driver to use when you attempt to access a device This is a link to How to Disable Automatic Driver Installation In Windows the article is for vista but should work in seven.

Maybe finding an MS engineer would help. I am not comfortable modifying inf files.
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 Why do CD drives spin up when a flash drive is plugged in?




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