I have an Aspire S5, with a 128GB SSD. The SSD is seen in the laptop as two 64GB drives, and is configured in RAID0 as default. At one point the RAID failed, and I tried to factory reset but the laptop wouldn't get into the recovery-mode (pressing ALT+F10 and all variations of ALT/CTRL/F-buttons) so I reinstalled manually with a USB.
In BIOS, both drives are seen as 64GB, but in Windows only the one drive I installed on is seen as 64GB, the other one is still seen as the RAID-drive (128GB). It's not usable since I have to format it first but I don't dare to do that. I can see that the recoverypartition is still on this, but since RAID0 being RAID0, I'm assuming that all data on this ghost-partition is not usable in any way.
When starting the laptop I get the Intel Rapid Storage Technology prompt (press CTRL+I), and it's saying that the RAID has failed, listing both drives (partitions), one of them as a member and the other one (the one I reinstalled Windows on) not as a member. So I deleted that configuration and thought I'd recreate it and reinstall Windows again. But when I deleted the configuration I can no longer access Intel Rapid Storage Technology at all, the prompt never comes up! It just boots straight into Windows. Pressing CTRL+I at startup gives nothing, probably because IRST isn't loading at all...
I'll assume that the recoverypartition is gone forever since I already reinstalled on one of the partitions, but I'd like to at least get RAID working again.
TL;DR - Intel Rapid Storage Technology uninstalled itself from the board, how can I enable it again?