Japanese user's guide for the Sonnet Fusion R400Q 4-drive Serial ATA rack mount storage system with quad interface. These directions apply to storage systems with drives.
Set Windows Device Policy to "Optimize for performance":
1) Click on "Start," right click "My Computer," and select "Manage" from the popup menu.
2) On the left panel tree, select "Disk Management."
3) Highlight the Sonnet Fusion Volume and select "Properties" from the popup menu.
4) Select the "Hardware" tab.
5) Highlight the Sonnet Fusion Volume and click the "Properties" button.
6) Select the "Policies" tab.
7) Select the "Optimize for Performance" radio button.
8) Click OK and exit.
Note: Make sure to use "Safe Removal" before disconnecting a Fusion storage system.
Another manufacturer's previously-installed SATA driver may be accessing a Sonnet SATA card in error causing a drive access slowdown. For example, we have seen Fusion D400QR5 performance drop from 200MB/s to under 50MB/s in such circumstances. The solution is to remove the other manufacturer's SATA driver.
