Woops, sorry not sure what happened there, wrong screenshot, see attached.

Ah, doesn't that leave me with no RAID?

If it wasn't clear - my laptop is intended to run a RAID, it ships with it as boot, i've swapped the media drive for an SSD and use the SSD as boot, and RAID as media drive.

Perhaps I've misunderstood you. I'm fine changing the SATA mode, but I thought your instructions were to NOT use raid . . ?

Yet it's running fine. IRST just shows an error, I've actually avoided IRST and haven't had any errors, i'm being cautious.

You're confident that there WILL be issues if I continue like, uninstall IRST, but leave the driver as is?

As we delved into this, it seems to have been forgotten that IRST WAS running fine. No errors, RAID transfer speeds weren't an issue.

The solution was (somewhere in the vicinity) of the Intel forum post I posted earlier.

Am I to understand you as saying:
1. I can't run RAID alongside 2 x HDD's in this system, period?

And the double adapter (for 2x mSata into 1 Sata port) makes no difference?

Ok, yet not being designed doesn't mean it can't run.

I don't have any mSata ports, only Sata ports. The 2 x mSata go into a double adapter which plugs into a Sata port (as per shipped).
The Media drive is in place of the DVD, and the SSD is where it's intended to be. So the only thing I've done different than intended is replace the DVD with a drive (assuming that running the mSata as media drive, not Boot drive, is much of a muchness).