The difference of minor number and instance number

I study how to develop device drivers. I am beginner.
I'm confusing the differece of minor number and instance number
what is the exact difference of them???

Hi,
I guess a good example would be a disk. Each disk you have would be a different instance. To use a disk it is divided into slices, each of which has a different minor number.
Your device driver needs to map the minor number to the correct instance of the device. How you do this is completely up to you, so to start you could map them one to one.
Hope that helps.
Ralph
SUN DTS

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The difference of minor number and instance number

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