The internal hard disk drive has a storage capacity of 6, 10, or 13 GB. The drive uses the Ultra DMA IDE interface, which is also referred to as the ATA-4 interface. The internal hard disk drive is connected as device 0 (master) in an ATA Device 0/1 configuration.
The software that supports the internal hard disk is the same as that in previous Macintosh models with internal IDE drives and includes DMA support. To obtain information about that software and about the ANSI standard for the Ultra DMA IDE interface, see ATA Devices.