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1. Q: If, for cost reasons, I try to mirror a slow disk with a fast disk, is the S/W smart enough to balance the reads accordingly or will it all slow down to the speed of the slowest?

2. Q: For testing the raw disk thru put... is there a character device for raw read/raw writes instead of /dev/sdaxx that we can use to measure performance on the raid drives?? is there a GUI based tool to use to watch the disk thru-put??