>Thee Chicago Wolf [MVP] wrote:
>>> I have a P55 based board with Win 7 Ultimate 64x on a SSD disk, to
>>> optimize for the SSd it was installed in AHCI mode. Now I need to create
>>> a RAID on the machine but to do that I need to switch the BIOS option
>>>from AHCI to RAID, doing this causes Windows to bluescreen on load (I
>>> thought RAID mode was still AHCI).
>>> Is there any way to fix this (I assume driver issue) without reinstalling?
>>> I know you can enable AHCI after install through a registry hack, maybe
>>> this can be solved the same way?
>> The analogy here is you asking why your unicycle can't work as a
>> bicycle, tricycle, or 4-wheeler. AHCI is SATA's native operating mode
>> for a single physical disk. RAID is RAID but on motherboards with SATA
>> it uses the AHCI interface for the hardware control defined in the
>> AHCI specification. You have to build a RAID set first and reinstall
>> your OS.
>> - Thee Chicago Wolf [MVP]
>I thought the idea was, you could convert single drive AHCI to
>single drive RAID, then do an online migration to a RAID array ?
No, you did not read it correctly:
"The RAID migration feature in Intel® Rapid Storage Technology enables
you to convert a RAID-Ready system into a RAID 0, RAID 1, RAID 5, or
RAID 10 configuration. The RAID migration feature also enables the
user to migrate from a RAID 0, RAID 1, or RAID 10 volume to a RAID 5
Did you see the statement RAID-Ready? It did not say AHCI-Ready. That
means the RAID set is already built and OS install was done to a RAID
set. It's fairly trivial to go from RAID X to RAID Y. In fact, I have
gone from RAID 0 to RAID 5 just by imaging from and old and then to
the new RAID set. It's that you cannot go from a machine that was
installed, for example, with the BIOS set to AHCI but not RAID/AHCI.
They are apples and oranges. It's all or nothing. The hardware
abstraction layer falls over basically. If you suddenly swapped out
your gasoline engine with a diesel, would you expect it to work?
- Thee Chicago Wolf [MVP]