I normally stay away from software RAID especially Windows RAID because of the overhead. However when I tried Windows 7 RAID, the performance wasn't bad at all. I was using RAID 1. I think there are still some issues to work out in this implementation though. I had two partitions on DRIVE 0 and DRIVE 1 which were both being mirrored. Partition 2 worked like a champ and mirrored all my data. Partition 1 though would occasionally have to rebuild bringing your performance to turtle speed. One reason the mirror would decide to rebuild is if the shutdown was hard, perhaps power went out or your computer froze and you had to hold the power button, or maybe you had a BSOD which has been rare for me on W7 anyway. Other times though it seemed it would just start rebuilding for the heck of it! After being patient for multiple rebuilds I disabled RAID. Other than this issue, RAID was great on W7. I read on some of the forums that many folks were having this issue or similar.
I will be trying it again on another machine and report my experience, I just don't have the time to screw with it now.
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