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Repairing and Upgrading Your PC
book

Repairing and Upgrading Your PC

by Robert Bruce Thompson, Barbara Fritchman Thompson
March 2006
Beginner to intermediate
448 pages
16h 7m
English
Make: Community
Content preview from Repairing and Upgrading Your PC

Optical Drive Performance

Optical drive speeds are specified using an "X-factor." The earliest CD-ROM drives transferred data at a constant 150 KB/s, the same rate used by audio CDs, which is referred to as 1X. Later CD drives used variable speeds, changing the speed according to where the head was positioned on the CD. It's impossible to assign a single speed rating to such a drive, so manufacturers began specifying the maximum speed those drives used. For example, a CD-ROM drive that transfers data at a maximum rate 52 times the 150 KB/s audio CD rate, or 7,800 KB/s, is called a 52X Max drive.

DVD drives use the same kind of speed rating scheme, but the DVD "X-factor" is different. The 1X DVD rate is 1.321 MB/s, which is the data rate required ...

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Publisher Resources

ISBN: 059600866XCatalog PageErrata