I have a 4x500GB RAID 5 Volume performing VERY slow even with write cache enabled (~15MB/s R & W). I am running Windows 7 32-bit. The system does see the RAID controller and I am using 220.127.116.113 drivers. However, I am unable to see the RAID volume in Device Manager and Storage/Disk Management in the Computer Management MMC. Everything was fine and fast when before I upgraded this comp from Windows XP SP3. Any help will be appreciated.