The storage capacity of the internal hard disk drive is 10 GB. The drive uses the Ultra DMA IDE (integrated drive electronics) interface, also called Ultra-DMA/33 and ATA-4, which is an improved version of the EIDE interface.
The software that supports the internal hard disk is similar to that in previous Macintosh PowerBook models with internal IDE drives and includes DMA support. For the information about that software, see the references in ATA Devices.