This is pretty startling. I just assumed that something like this would work, since most people have growing data needs and adding new pools to a stripe would be a waste of money, space, power, time, etc. I'm glad I read this - I'll go ahead and buy more hard drives now, though I would rather have waited until prices dropped before adding additional drives that I don't need.
The other reason this is bad from a storage perspective (I would think) is that having all the drives added in to the stripe at once will make them each incur similar usage patterns, increasing the probability that failures will occur at the same time or around the same time. -- This messages posted from opensolaris.org