TJG79, if you reset the disks to Non-RAID, you may lose all you data, so instead of resetting the disks and create a new volume, I would recommend you to change the SATA mode on BIOS to AHCI or IDE.
Disconnect 2 out of the 3 hard drives, and run the Seagate Seatools on the drive that is still connected to the computer.
Once it finish, you would need to connect the other 2 hard drives, set the SATA mode to RAID again and start the rebuilt on Windows using the Intel® Rapid Storage Technology.
In order to run the Seatools on all disks, you would need to follow the same process to each of them. It might take longer, but this way all your data will be save.
Remember that a RAID 5 needs at least 3 hard drives, and in order to rebuild the array, there must be 2 hard drives active and running. For that reason you can only run the Seatool one disk at the time, while the other 2 will stay on RAID but with no fault tolerance.
You may want to backup all your information just in case.
Thank you Sylvia,
From my consultation with Seagate tech support, for Seagate Seatools for DOS testing to be valid, I need to remove the hdds from RAID and test individually. This applies even in the DOS environment.
I've had an hdd pass the Seatools for DOS short and long tests, but fail the full erase with the Seatools utility. The hdd that failed the full erase would subsequently format in Windows 7, successfully pass a Windows Check Disk with all options selected, pass Seatools for DOS short and long tests again, but again fail the full erase with the Seatools for DOS utility. To completely check and test a Seagate SATA hdd for issues, you've got to run the Seatools for DOS long test and full erase program in a non-RAID configuration.
Thanks again for the information.