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Technical Notes: Device Drivers
Mass Storage Devices
Mass storage devices run the gamut from the fastest read/write peripheral disk drives to sequential-access tape drives. Mac OS X provides a layered mass storage driver stack that has built-in support for common industry-standard devices. Developers can use the BSD interface and the I/O Kit (Apple's object-oriented driver development framework) to access storage devices and their media at different layers of the stack. | 
