It seems to me, that this new RAID ROM v184.108.40.2064 in combination with the newest Intel RST(e) drivers of the v11.5 branch (actual: v220.127.116.114) may be able to support the TRIM command under Win8 even for SSD's, which are members of an Intel RAID0 array.
This is what Intel had written in August 2011 within the "Intel® Rapid Storage Technology 18.104.22.1689 Alpha Version Release Notes":
This release will not enable the TRIM on RAID0 feature, but it will be added in the next RST 11.5 release.
That statement was hard to believe, because the TRIM command is an ATA one, but the Intel RST(e) drivers are working with an additional SCSI filter driver named iaStorF.sys, which usually shows all connected HDD's/SSD's as SCSI Disk Devices.
After having flashed the Intel RST(e) ROM v22.214.171.1244 into the BIOS chip of my ASUS P8Z68-V and after having installed the Intel RST(e) drivers v126.96.36.1994 onto both Operating Systems Win7 x64 and Win x64, which are running within the RAID0 array, I was very surprised after having done a deeper look into the Win8 Device Managers.
Here are the screenshots:
- The combination Intel RST(e) RAID ROM v188.8.131.524 + Intel RST(e) v184.108.40.2064 drivers obviously prevents, that the OS Win8 addresses the drives inclusive the Intel RAID0 as SCSI Disk Device.
- Windows 8 is able to run the Intel RST(e) drivers of the v11.5 series without directly using the SCSI filter driver iaStorF.sys (It is not even within the Windows\System32\Drivers folder!).