Thanks for posting in our community support. Since this situation is not related to an Intel® SSD, we are moving the thread to our chipset support community.
I already had the latest version of IRT. So this is not the issue.
The problem remains though, I keep getting the same error.
Everything works, even configuring my SSD to RAID, only actually accelerating my HDD doesn't.
I've literally searched the entire WWW concerning this issue and have come up with no solution.
1. You mentioned you changed SATA mode to RAID. My question here. Did you reinstall the operating system after swapping SATA modes? For Intel, this is a requirement.
2. What is your computer model?
3. Was your SSD as unallocated when you tried to accelerate?
Steps to enable SSD caching:
First, connect both drives to the Intel-powered SATA ports in your system; then fire it up, enter the system BIOS, and configure the SATA controller to RAID mode. Restart the system and install Windows on the hard drive, ignoring the SSD for now. When the Windows installation is complete, install the drivers necessary for your system's components, including the chipset drivers and the Rapid Storage Technology (RST) drivers; you can download both at the Intel Download Center.
Once you've installed those drivers, the system will restart, and the RST control panel will become accessible via an icon in the system tray. Double-click the RST icon, and in the resulting control panel click the Accelerate menu button; then select the SSD and specify how much storage space to dedicate to Smart Response Technology. SRT can use up to 64GB of SSD space for caching. With a 64GB or smaller SSD, you can use the entire drive and the OS will view the system as having just one drive. With an SSD of more than 64GB, you can use as much of the drive for SRT as you like and you can partition unused space on the SSD and assign it a drive letter.
After selecting the SSD and defining its capacity, you can enable acceleration and choose an SRT mode. Two modes are available: Enhanced and Maximized. Enhanced is essentially a write-through cache mode, with writes speeds limited by the hard drive's performance. Maximized mode acts as a write-back cache, an arrangement that yields optimum overall performance because it involves caching writes and then writing them to the hard drive later.