Here is a bit more detail, see if this helps:
Internally, port 0 is the 32GB mSSD, port 1 hosts an OCZ Agility3 and port 2 has a Seagate 2TB hard disk attached.
Error message when I try to enable SRT is "An unknown error occurred while an operation was in progress. The operation could not be completed."
This is matched by a warning (event ID 32) in the system event log with a source of 'disk', the body of which reads:
"The driver detected that the device \Device\Harddisk0\DR0 has its write cache enabled. Data corruption may occur."
For this behavior these are the recommendation we can provide you:
Please check there are not partitions on your SSD. If there is any, you would need to delete the volume or the partition. Do not format the drive.
Install the latest Intel® Rapid Storage Technology version available which is 18.104.22.1686