I just replaced my optic drive from MacBook Pro with another 500gb HDD and I want to speedup one of the partitions.

The first drive has two partitions, named 106 and 107 and I want to convert one of them to use the second drive.

The problem is that disk utility does not let me add any of the partitions from the first disk to a RAID set.

What should I do? I don't want to reinstall everything.

Here is what I would like to obtain from my 2 500gb HDD:

* one striped partition of 2\*300GB, this would be used for speed (compilation)
* rest of the free space other partitions,
* still be able to have a partition with Windows on it, a real partition.