Inside System Storage -- by Tony Pearson

Tony Pearson Tony Pearson is a Master Inventor and Senior IT Specialist for the IBM System Storage product line at the IBM Executive Briefing Center in Tucson Arizona, and featured contributor to IBM's developerWorks. In 2011, Tony celebrated his 25th year anniversary with IBM Storage on the same day as the IBM's Centennial. He is author of the Inside System Storage series of books. This blog is for the open exchange of ideas relating to storage and storage networking hardware, software and services. You can also follow him on Twitter @az990tony.
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An interesting read. I've been playing around with some state of the art SSD drives from a 3rd party. They've partially solved the 'Achillie's heel' with write performance close to 50% of the read performance. <div>&nbsp;</div> The only way I could benchmark it was to hook it up to a switch in public loop mode and run it through SVC - no other controller / FC-AL loop I had to hand could cope with the IO/s it could sustain!<div>&nbsp;</div> However, even this 'simple' step is disruptive. Today's storage controllers have evolved to hide the deficiencies and latencies of spinning magnetic media, reduce the latency to micro or even nano seconds and its suddenly a very different beast. Do you even need a cache any more? Do you use SSD as a cache, or does it become a new Tier 0... <div>&nbsp;</div> It does feel like we are on the brink of a few very interesting things in the storage world. I can't help but think the magnetic disk drive could soon be enjoying its twilight years as primarily an archive medium... however could it ever replace tape? is it a viable long term archive medium?<div>&nbsp;</div>

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