Does your HDD have a recovery volume on it? That is common with laptops. If so, the recovery volume does not allow acceleration/caching.
If you run the IRST GUI, and click on Help, you'll find an entry about Accelerating the system, which may help you.
My HDD had a recovery partition. I deleted it and reinstall the Raid storage driver again, but......
The acceleration button is still missing...
I was able to accelerate my notebook hdd after deleting/toggling a second NTFS-partition which wasn't a recovery partition.
But i need my second hdd partition....
Is there any other option??
I would boot with a Linux CD or DVD to toggle the second NTFS partition from 7 (NTFS) to 83 (Linux), reboot and check whether the acceleration is working then or not. After the test you can re-toggle it back to 7. That's the way I did it.
I've run into a similar problem.
Make sure you don't have any data that you want on your SSD cause it's going to get wiped.
type in DISKPART
(or just open CMD and type DISKPART at command line)
Type LIST DISK
Look at the output and select your SSD like so (if it's disk 1)
SELECT DISK 1
Restart the ISRT manager and you should now hopefully see the accelerate tab.
It's clean and not clear, but you're great...