Oh my goodness! I feel like it's my first day in physics class for electricity and magnetism - trying to understand the relationship between two separate kinds of force. Just when you think you've understood it, something is said and then you are stunned.

I do not understand this:
>If you will flash a BIOS containing an X79 modded RST v11/v12 Intel RAID ROM instead of the original RSTe v3.x.x.xxxx ROM, your Intel SATA RAID Controller will still be an X79 chipset one (DEV_2826). <
The OROM version determines which driver I can load - the 3.x.x.x.xxxx or the series 11/12 - to install and run the OS. What does DEV_2826 have to do with it?

And I think I understand this:
>This is totally different from X79 mainboard BIOSes, which contain 2 Intel RAID ROM modules (the "normal" RSTe v3.x.x.xxxx ROM and additionally an RST v11.6.0.1702 ROM),<
Are you saying that SOME x79 main boards have a bios that includes both OROMS?
This is what the the wiki (http://en.wikipedia.org/wiki/Intel_Matri...ager_option_ROM) says:
"For the X79 chipset, certain Motherboard MFG's have added both RAID ROM's in the BIOS, the RST and RST-E ROM. X79 is the Enterprise version, called RST-E. With the RST ROM added to the BIOS, this allows TRIM function to pass through the controller and TRIM SSD drives. As there is no support for TRIM with the RST-E version of the ROM. If the Motherboard MFG has not added the RST ROM to your BIOS, you can mod the BIOS with a modified ROM for the X79 found here, that only contains the RST-E ROM. ([24])
The Intel RAID ROM is the firmware in the motherboard BIOS that is used to create the RAID array.
NOTE: The RST drivers can be used for RAID and also on a single drive as it contains an AHCI driver. There is a BUG in the version 12.5.0.1066 RST driver, which cause TRIM commands NOT to pass through the controller to the drives. TRIM is disabled using this driver."
Obviously mine doesn't because I cannot use the v11/12 drivers on the stock OROM. However, ASUS seems to allow it on their Rampage series of boards.

This part then becomes Greek to me
>That is why you will be able to install any original RSTe driver and software v3.x.x.x.xxxx without any problem, whereas you have to force the installation of any original Intel RST driver v11/v12, because the DeviceID DEV_2826 is missing within the original iaStorAC.inf file.<
How can you 'force' the installation of a v11/12 driver on a normal RSTe v3.x.x.xxxx OROM? I thought the whole point of flashing a modded bios was to enable a v11/12 driver. Y

I understand the bit about needing the v3.x.x.x.xxxx SOFTWARE to enable write back caching. I conclude that the v3 SOFTWARE requires an x79 chipset and does not care about what exists in the OROM, v3 or series 11/12. In step 13 where you said:
Install the latest Intel RSTe Drivers & Software Set v3.x.x.xxxx and reboot
The purpose was simply to achieve the write back enabled setting. I assumed that you cannot install the software without the drivers and that the driver part of the installation cannot be avoided. The drivers get written to the drivers folder (overwriting the v11/12 ones).I assumed that the v3 software should be uninstalled before you reboot and that the storage driver should be updated manually back to v11/12 through device manager. Right? If you did reboot with v3 installed, the OROM has been modified so the v3 drivers would not be used. The OS cannot load because the v11/12 drivers are missing and the RAID cannot be started.

Shouldn't Steps 14 and 15
14. Run the Intel RSTe Console and enable the "Write-Back Caching" feature. Then do a reboot.
15. Uninstall the Intel(R) Rapid Storage Enterprise Technology software from within the Control Panel. Then reboot.
all be combined into one BIG step 13 before reboot?

Zitat von Fernando im Beitrag #17

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.....No, the RAID OROM version doesn't determine the RAID driver version you can use. The correct statement would be: You can use any RAID driver version, which is compatible with your chipset resp. Intel SATA RAID Controller,

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