1. Check the BIOS version. If it's not the latest, update it.
2. Check HDD compatibility. Untested hard drives may sometimes cause unexpected behavior.
3. Force your HDDs to 1.5Gbps transfer rate and see if it makes any difference. Normally you can do this by using a jumper on the HDD.
4. Are you using any kind of hot swap backplane? If yes, try to connect the hard drives directly to the board to isolate the issue.
Were you able to fix this? Thanks! I am also encountering the same problem but on a Linux installation and I configured RAID 1 using the Intel Embedded Server RAID
Have you found the solution to this issue?