Here is How to Enable or Disable Write-Caching for a Storage Device in Windows 7
1. Open the Control Panel as All Items view and click on the Device Manager icon.
2.In Device Manger, double click on Disk drives to expand it, then double click on the listed storage device to enable write caching for.
3. Click on the Polices tab. Under the upper Removal policy section, select Better performance.
4. To Turn Off Windows Write-cache Buffer Flushing on the Device and Click on OK.
6. Click on Yes to to apply and restart the computer .
