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Vol. 7 No. 7 September 2008

DC power can cut costs, but conversion isn't easy

storage arrays that use direct current (DC) electrical power instead of standard alternating current (AC) power could be the next big thing, especially with Framingham, MA-based research firm IDC estimating that the amount spent on powering and cooling all of the external storage arrays worldwide exceeded $1 billion in 2007. Proponents of DC power say it produces 20% to 40% less heat and is more reliable than AC power. "The primary electrical fuel for the telephone network is DC power," says Jay Krone, EMC's senior director of storage platforms. "And that's why when the lights go out, the phone still works." While most server vendors offer DC power options, only major storage array vendors like EMC, IBM and Sun are much into DC power options for their products. EMC is on its third generation of DC-power Clariions, and recently qualified its Centera product line for DC power. IBM offers a DC power option for its DS3300 storage array, while Sun has its Netra st D130 storage unit. And in June, OEM storage array maker Dot Hill ...

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Features in this issue

  • Ask the Experts: RTOs and RPOs

    Is there a standard ratio between RTOs and RPOs, or are they independent of each other?

  • CDP in depth

    Continuous data protection (CDP) technology is now a viable alternative to traditional backup software and storage system-based replication software. But CDP products can vary significantly, especially in the context of different storage architectures. Depending on specific environments, companies may have to evaluate very different criteria before settling on a CDP product.

  • The lure of open-source backup programs

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