Good description of what Xiotech does in their arrays that make them pretty sweet. One thing they don't note is cooling — because the disks counterrotate they end up having backplanes on both sides of a 3U disk unit. This means a nice big hole down the middle of the disk pack, and air can be circulated slowly down the center instead of the standard high-velocity fan setup, needing to push air around a backplane. Cool (pun intended).
So the new guideline is to forget rescue breathing in CPR and just start compressions. That's a big change but it makes sense.
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