Storage Soup

Jul 26 2007   4:11PM GMT

Storage bloggers dig in on HDS and EMC product claims

Beth Pariseau Beth Pariseau Profile: Beth Pariseau

Following EMC Corp.’s storage announcements last week, which included the introduction of a new Symmetrix array, the industry has been buzzing with the claims and counterclaims of EMC and high-end disk array rival Hitachi Data Systems (HDS), as well as debates over the merits of each company’s products.

In the past week, two storage consultants in the UK have dug into the technical specs of Hitachi’s USP and the new Symmetrix DMX-4. Nigel Poulton over at Ruptured Monkey takes a close look at the pros and cons of Hitachi’s external virtualization vs. EMC’s internal tiered storage. Meanwhile, storage consultant Chris M. Evans discusses the “green” claims being made by both vendors in their recent array announcements.

Nigel concludes that there are pros and cons to both the HDS and EMC approaches, depending on a user’s particular environment, which leads him to ask a very pertinent question:

There is certainly a demand for both [approaches to tiered storage]…When compared to something like Thin Provisioning, which both vendors are working on, implementing the above features would be a comparative walk in the park.

So if it’s not that hard to implement, and by doing so you potentially hang on to your customers, why not pinch your nose and take the plunge?

Too much Kool-Aid might be the answer.

As for Evans, his conclusion is that “neither vendor can really claim their product to be ‘green’.” HDS’s USP, he concludes, still has a higher power cost per-drive than EMC’s Symmetrix. However, he doesn’t gloss over the weakness of using higher-capacity drives (to which every systems vendor has the same access) to make a “green” claim, saying, “customers choosing to put some SATA drives into an array…[will] see only modest incremental power savings.”

Evans is not the first to bring up the need for big vendors to step up their efforts further around power consumption, particularly when mushrooming data retention and compliance archiving requirements mean data management strategies for reducing storage growth are losing their effectiveness. Users at this year’s Storage Networking World conference in San Diego also called on storage vendors to invest in better silicon rather than pushing the issue back onto users and, in essence, blaming them for their storage management practices. Elsewhere, server and PC makers have already begun moving to more efficient power designs within systems, and users, like Evans, are looking for a similar committment from storage manufacturers to built-in reductions in power consumption–rather than lip service about the latest SATA drives.

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