Method and system for increasing the performance of constant angular velocity CD-ROM drives
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United States of America Patent
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Apr 10, 2001
Grant Date -
N/A
app pub date -
Nov 17, 1997
filing date -
Nov 17, 1997
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Abstract
A method and system for increasing data retrieval rates for constant angular velocity and hybrid constant linear velocity/constant angular velocity CD-ROM drives. The data stored on CD-ROMs is normally placed starting with the innermost tracks and proceeding outward to the edge of the disk. Any unused or spare capacity occurs as an unused band at the outer edge of the disk. Because access times for files greater than a certain threshold size decrease with increasing radius at which the files are located on a CD-ROM for constant angular velocity and hybrid constant linear velocity/constant angular velocity CD-ROM drives, placing data files at the outer portions of the CD-ROM and leaving unused spare capacity towards the center of the CD-ROM will give better data retrieval rates when the CD-ROM is read in constant angular velocity or hybrid constant linear velocity/constant angular velocity CD-ROM drives.
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