On Wed, Jul 4, 2012 at 8:18 AM, Li Flost.Dexiong <havefan2012@gmail.com> wrote:

I add some log on the read function of my class. and notice that if i do some read on disk1s1, my read function will be called. if i do some read on disks1, my read function will not be called.

The IOMedia object corresponding to disk1s1 is created by your partition scheme. The IOMedia object corresponding to disk1 is NOT created by your partition scheme - it is the provider media of your partition scheme and created by the driver for the underlying disk device. HTH phil _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.... This email sent to site_archiver@lists.apple.com