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Method for enhanced PC file storage for efficient retrieval and power savings through software

IP.com Disclosure Number: IPCOM000005853D
Publication Date: 2001-Nov-12
Document File: 2 page(s) / 64K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for enhanced PC file storage for efficient retrieval and power savings through software. Benefits include improved power utilization efficiency, improved file retrieval efficiency, and reduced fragmentation.

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Method for enhanced PC file storage for efficient retrieval and power savings through software

Disclosed is a method for enhanced PC file storage for efficient retrieval and power savings through software. Benefits include improved power utilization efficiency, improved file retrieval efficiency, and reduced fragmentation.

Background

              One of the biggest issues concerning notebook PCs is power consumption. Users want their notebook PCs to run as long as possible on battery power. To improve efficiency, manufacturers are reviewing the contributing factors. The hard disk is found to be among the biggest power consumers.

Description

              Consumption can be reduced by reducing the frequency of activities performed by the hard disk. Disk access can be reduced by moving infrequently used files to a distributed file system, compressing less frequently used files, and enhancing disk cache software to enable often used files to be moved and locked in SRAM disk cache. Power can also be conserved by limiting the number of times the disk spins up to access files and by minimizing the amount of time required for the disk interface per access.

              Tracking file usage helps to determine the type of storage to be used. The file management system of the OS must be modified to track access to files on the PC. Storage mode of files is based on the access frequency category. Perhaps a variety of file-access-frequency categories can be derived (see Figure 1), such as:

              a.           Almost never
b.           Very seldom
c.           Occasionally
d.           Frequently
e.           Very frequently

              The use of a distributed file system across a connected mobile PC reduces disk space for infrequently used files. Most frequently used files are kept on a local system. Least frequently used files are aged and eventually moved from the local PC to distributed storage on an Intranet storage device (plugged into constant AC power). As data is moved to the distributed file system, the file is replaced with a pointer to the distributed file system where the real file ...