Linked by David Adams on Tue 20th Mar 2012 17:27 UTC, submitted by sawboss

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Member since:
2011-01-28
A very clever OS might even be able to pragmatically determine the disk's phase and velocity by timing it's response latencies. It might then create a model in software of the disk's platter/head position at any given point in time and then determine which disk of a raid array is more likely to respond quicker and then only send the request to that disk.
I have to wonder whether any of this micromanaging could offer a performance benefit over a simpler implementation of using a dual disk elevator algorithm. Even a 25% increase in seek speed might be worthwhile for a seek-bound database.