Engineering Design NIDisk Guide de l'utilisateur télécharger pdf (Page 29)

NIDisk User Guide

Disk Fragmentation and Maximum Sample Rate

On older hard disks, fragmentation can degrade the maximum sample rate. Disks can be

defragmented by clicking My Computer | Local Disk | Properties | Tools | Defragment Now.

This process should be performed with care, and a full backup is recommended before

degragmenting.

Notebook Power Management

Some notebook computers (such Toshiba models) optionally reduce processor speed when

running from batteries, to conserve battery life. This can severely reduce the maximum

achievable sample rate. To avoid this, reconfigure the computer’s power management

program (usually available from the Control Panel) to run at full processor speed on battery

power.

As an example, following are steps for reconfiguring a Toshiba Satellite 2250CDT: 1) run

Power Saver from the Control Panel (not the Windows-supplied Power Management utility),

2) in the "Running on batteries" section, set the power mode to High Power, 3) click Details,

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Engineering Design NIDisk Guide de l'utilisateur Page 29