No, I am not running win 7 yet. That's what I would like to do once I have raid properly configured. I have win xp running on a velociraptor.
I had NTFS formatted the SSDs individually for single drive tests. Then when I built the array it removed all partitions and I had to format it again to NTFS.
I am not sure how to check the stripe size for my raid controller. I left everything default when I built the raid array for the SSDs. The only thing I remember seeing during the config was a sector size, which I left to default as well.