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Using OS X, I have a 1 TB hd. I have an empty 1 TB that I want to use to create a mirrored array. All the instructions I can find about creating the mirrored array require copying the existing hard drive (which is my boot drive) to a third location, creating the RAID then copying the data back.
Why?
Is there not way to me to just tell OS X that my existing boot drive was already part of a RAID and that 1 drive failed and I wnat to re-create the RAID with the new drive?
hardware RAID controllers operate on drives, and assume their RAID sets are setup before data is written to the drives. some software RAID implementations (eg Linux) can operate on partitions, so they may be able to do the kind of thing you're asking about. – quack quixote – 2010-02-23T03:44:19.677