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Chapter Overview
CDROM and DVD Drives Advanced Hard Disk Drives SCSI Drives
1
Advantages of CDROM and DVD Drives
Large storage capacities Portability
Data cannot be changed Sturdiness
Special capabilities Low cost
High speed
2
CDROM vs. Hard Disk Drives
There is no physical contact between the CDROM and the reading device.
Storage tracks allow more data storage.
Hard disks are less expensive and getting larger.
Optical devices are used for archiving.
Data is written to a CDROM by creating pits and lands on the CD surface.
3
DVD: A Super CDROM Alternative
DVDROM: read only; holds up to 17 GB of data
DVD video: 4.7 GB; holds up to 135 minutes of video
DVDR: recordable; holds up to 3.95 GB of data per side
DVDRAM/RW: slow gaining acceptance because of incompatibilities
4
Connecting CDROM and DVD Drives
Adapter boards: Enhanced Integrated Drive Electronics (EIDE) or Small Computer System Interface (SCSI)
Sound cards with CD controller on board SCSI host adapter
EIDE connector
5
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