Sonnet engineering has fixed this issue with some Fusion storage systems. This issue was addressed and fixed as follows:
APRIL, 2008: in Fusion D400Q and Fusion D500P systems with serial numbers beginning with J.
MAY 20, 2008: In Fusion D800RAID with serial numbers beginning with G.
All versions of Fusion R400Q and R800RAID are compatible with Seagate ES.2 Drives.
Note: Seagate ES.2 drives have lower performance than Sonnet recommended 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.