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Disk drives
m Apple SuperDrive 1.4 MB high-density floppy disk drive
m Internal IDE hard disk drive (1/3-height)
m Internal CD-ROM player (optional)
m A combination of up to six internal and external SCSI devices
can be used.
CD-ROM specifications
m Disc diameter 120 millimeters (4.7 inches)
m Scanning velocity 1.2–1.4 meters per second
m Rotation speed Varies over radius
Normal speed ~530 to 230 rpm
Double speed ~1060 to 460 rpm
Eight-times speed ~4240 to 1840 rpm
m Latency (average) Varies over radius
Normal speed ~55 to 130 milliseconds (ms)
Double speed ~27.5 to 65 ms
Eight-times speed ~6.88 to 16.25 ms
m Blocks per rotation ~8.4 to 19.5 variable
WARNING
Although instructions for installing SIMMs are provided in
this manual, Apple Computer recommends that you have an Apple-
certified technician install additional DRAM or cache. Consult the
service and support information that came with your computer for
instructions on how to contact an Apple-authorized service provider or
Apple for service. If you attempt to install additional SIMMs yourself,
you risk damaging your equipment, and this damage would not be
covered by the limited warranty on your computer. See an Apple-
authorized dealer or service provider for additional information about
this or any other warranty question.
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Appendix D