As we discussed in other threads it could be particularly advantageous to use SSD RAID0 arrays for dual or even multiple booting. With a decent amount of striped SSDs the idea is to run all your operating systems and applications with high speed. At least that is the theory. To test the idea I have decided to use two Maxtor 160 GB HDD in a very basic dual RAID0 array configuration for booting OS X and Vista-64 in AHCI mode. Here we go: First thing I learned is that you have to partition the HDDs prior to building your array. Second thing I learned is that you have to keep it all in HFS+ to make it work. So now I have used disk utility to create two equal size partitions in HFS+ with GPT on both HDDs. Next I fused the two lower partions together for a first RAID0 array named 2R-Leo. Format is still set to HFS+ and RAID0 mode is selected. Then I fused the two upper partitions together for a second RAID0 array named 2R-Vista. Here format is also set to HFS+ and RAID0 mode is selected. With that done I exited the disk utility to get a fresh start on it. I then entered disk utility again. Now comes the formating of 2R-Vista from HFS+ to NTFS. To make things easy I have 3rd party NTFS drivers from Paragon. So here I went to the formating section of disk utility (I think it is named deleting) and deleted the 2R-Vista array with NTFS. Obviously you can also use FAT32 if you do not have Paragon NTFS. I prefer the right format because I will try to take a shortcut to installing Vista from a Winclone image that has AHCI drivers activated. At this point we are ready to clone OS X from an existing boot drive to the 2R-Leo array. I'm using disk utilitie's restore section for the job. I'm now ready to boot from my 2R-Leo array. Booting went without problems. Now comes the bummer. Neither a Windows DVD nor the Winclone program recognizes the 2R-Vista array. I'm stuck at this point. What can I do to make EFI and Windows recognize that I have another bootable partition here?