The storage capacity of the internal hard disk drive is 20 GB on the CD-ROM model and 30 GB on models with Combo drive. A 40 GB drive is available as an option. The drive uses the Ultra DMA IDE (integrated drive electronics) interface and is ATA-5 compatible. Current Data Transfer Mode for the drive is UDMA-33.
The software that supports the internal hard disk is similar to that in previous models with internal IDE drives and includes DMA support. For the information about that software, see the references in "ATA Devices" (page 70).
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