Commentary

Terry Sweeney
 

A Paradigm Spins Down

Which is better (and less cliché) than a paradigm that shifts, in my opinion. But based on public and private comments from readers, it's well past time to do away with these fault-prone spinning platters called storage arrays. Here's why.

Which is better (and less cliché) than a paradigm that shifts, in my opinion. But based on public and private comments from readers, it's well past time to do away with these fault-prone spinning platters called storage arrays. Here's why.This conversation -- that spinning drives are the data center's clunkiest dogs -- isn't a new one. But what it took to change the tenor of what's been repeated during the last five years was the voice a of a large and influential user. Specifically Google. About a year ago, the search engine giant released a study that severely undercut the performance guarantees of the major disk vendors.

Robin Harris covered this interesting issue in his Storage Mojo blog, and also included a thorough discussion of what's meant and implied in the terms mean time between failure (MTBF) and annual failure rates (AFR), two metrics that are the basis of vendor warranties.


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Then, earlier this past March, some researchers from the University of Illinois did some piling on. Yes, disk failure contributes to 20% to 55% of storage subsystem failures; unfortunately, other physical interconnects like broken wires, shelf enclosure power outages, and HBA failures accounted for anywhere from 27% to 68% of problems. Ouch.

So as I look out on the horizon and see solid state, flash, even holographic storage, I wonder what it will take for the industry to wean itself off of spinning disk. Vendors have plenty invested in the systems and interfaces, not to mention a nasty dependence on the revenue stream they derive from these commodity products. Google and some academicians can't single-handedly shame makers of storage products away from disk. But they can shift the conversation so that there's discussion of amazing levels of reliability, rather than repair or replacement.

There's a paradigm that data center pros would be happy to adopt.


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