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Vol. 4 No. 1 March 2005

Two routes to tiered storage

Internally tiered storage--a shelf of low-cost disk in an otherwise expensive storage system--is all the rage with storage buyers. To wit: Twenty-five percent of the total number of terabytes shipped in 2004 by storage array maker Engenio was in the form of SATA drives, says Steve Gardner, director of product marketing. This represents a tenfold increase over 2003. But how to engineer that inexpensive tier is a debatable issue among storage vendors. One option is to plug cheap and plentiful SATA drives into an existing Fibre Channel (FC) chassis by way of FC-to-SATA protocol conversion hardware, typically bridge or router chips. Alternatively, a vendor might align with Seagate and adopt its inexpensive FC drives. At this time, the industry seems to be going down the bridge/router path, as exemplified by Sierra Logic's SR-1216 router, which allows an FC disk enclosure to accept SATA drives. As of last month, Dot Hill (supplier to Sun Microsystems), Engenio (supplier to IBM, SGI and StorageTek) and Xyratex (supplier to Network ...

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Features in this issue

  • SMI-S has legs

    SMI-S support gaining ground

  • Midmarket yearns for remote replication

    Midsized companies want enterprise-class replication

  • Spotlight on midrange arrays

    Midrange arrays can handle most jobs traditionally associated with costly monolithic arrays at a far lower price. Our Special Report describes the benefits of these modular storage systems, profiles 14 of the leading midrange arrays and offers a look at what's coming.

  • Securing IP SANs

    IP SANs use commodity hardware and industry-standard protocols to provide a cost-conscious, easy-to-manage alternative to Fibre Channel arrays. But with IP comes the issue of security. We detail five ways to make an IP SAN more secure.

  • Buzzword: SPAID

  • Rescue stranded storage

    by  Alex Barrett

    How SRM products can help you discover capacity that isn't accessible to an array.

  • First Look: Archivas ArC

    Archivas' ArC software is a highly scalable archiving application that can store fixed content as WORM data while still providing quick access to files.

  • NAS heads: Gatekeepers for enterprise storage

    A NAS head can aggregate disk capacity on storage systems, making it easier to share files and usedisk space efficiently. NAS head capabilities vary, so understanding product features and your requirements is crucial.

  • EMC TOEs the iSCSI line

    by  Alex Barrett

    Target-side TCP/IP Offload Engine chips have arrived, but the jury is still out on whether you should care.

Columns in this issue