Intel IRST Intel Rapid Smart Technology issue: Accelerated Device 'None'

I’ve come across an issue twice in the last week where Intel IRST acceleration could not be properly enabled as the Accelerated device after enabling acceleration still said ‘None’. As can be seen from the screenshot below, the status for the device says ‘None’ and if ‘Select device’ is clicked on we get an error to indicate that acceleration is actually not working:

After trying various permutations, the issue was resolved by refreshing the partition table. PFB the steps for the same:

Ø  Click on ‘Reset to available’ to disable the current acceleration of the HDD using SSD.

Ø  Open Disk Management and right click on the primary partition and choose to shrink it. It doesn’t matter how much size you shrink it to, we just need to shrink the OS partition and have another volume created as ‘Unallocated space’. Do not format this newly created volume, leave it as it is for now.

Ø  Once this process is done, again launch IRST and enable acceleration. Now you would see the current HDD volume being selected for acceleration using the SSD.

Ø  Restart the system and open Disk Management again, choose to extend the primary partition again so that the earlier created volume is re-joined.

Ø  Restart once more to confirm acceleration is still working, it should be.

This issue would normally be seen once a customer has performed OSRI and the partition table is not picked by the IRST application. Hence, the shrink procedure is used to refresh the partition table and IRST is able to pick up the OS volume to accelerate.