Technical information

CHAPTER 3
Devices and Ports
34 Hard Disk Drive
Hard Disk Drive 3
The PowerBook G3 Series 1999 computer has an internal hard disk drive with a
storage capacity of 4, 6, or 10 GB. The drive uses the extended IDE (integrated
drive electronics) interface, which is also referred to as the ATA interface. The
implementation of the ATA interface on this computer is a subset of the ATA/
IDE specification, ANSI proposal X3T10/0948D, Revision 2K (ATA-2).
The software that supports the internal hard disk is the same as that in previous
Macintosh PowerBook models with internal IDE drives and includes DMA
support. For the latest information about that software, see Technote #1098, ATA
Device Software Guide Additions and Corrections, available on the world wide web
at
http://www.devworld.apple.com/dev/technotes/tn/tn1098.html
The web page for Technote #1098 includes a link to a downloadable copy of
ATA Device Software Guide.
Hard Disk Dimensions 3
Figure 3-2 shows the maximum dimensions of the hard disk and the location of
the mounting holes. The hard disk is physically smaller than the ones in
previous PowerBook computers: only 12.7 mm (0.5 inches) high.
The minimum clearance between any conductive components on the drive and
the bottom of the mounting envelope is 0.5 mm.