If your computer has a SATA (Serial-ATA) hard drive, then Windows Vista includes a feature that utilizes aggressive write caching. This is where data is written to a RAM cache first before it's written to the hard drive. This speeds up your data write operations, although it can cause data lost if your power goes before all the data can be written to your hard drive.
- From the Start menu, right-click on Computer, and select Manage.
- Click on Device Manager
- Expand the Disk Drives entry.
- Right-click on your SATA hard drive and select Properties.
- Click the Policies tab.
- Check 'Enable Advanced Performance'.