You can speed up your SATA hard drive by enabling write cache in your operating system. But with enabling write caching is an increased risk for data loss/corruption should you experienced a power loss. But this risk will less in laptop computer because it’s use battery. To enable write caching in windows vista please follow this steps :

1. Click on the Start Button, enter Device Manager and hit Enter.
2. Expand Disk Drives.
3. Right-click on your hard disk drive and select Properties.
4. On the Policies tab, check Enable Advanced Performance.
5. Click OK and close Device Manager.