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Vol. 2 No. 9 November 2003

Roomier Backup Arrays-Sort of

Arrays based on ATA drives are pretty cheap, but storing backups to them can eat up capacity at a furious rate. Don't be surprised when you start seeing disk-based backup products that advertise capacities such as 23.4TB. That's the figure being promoted by Palo Alto, CA, startup Data Domain for its DD200 disk-based "recovery storage appliance." Read the fine print, though, and you'll find that those 23.4TB are virtual. In actuality, the DD200 holds 16 disks in a standard 4U high package, for useable physical capacity of 1.2TB, for a list price of $58,000. According to Brian Biles, Data Domain co-founder and vice president of marketing, a single DD200 should be enough to hold up to five months of backups for a 1TB to 1.5TB backup data set. How does Data Domain turn 1.2TB into 23.4TB? It uses a combination of standard tape compression, and a data reduction technique it calls Global Compression Redundancy Pooling. Together, these two types of compression can reduce capacity requirements by 20 times. Another startup, Irvine, ...

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Features in this issue

  • Defragmenting Disks Falls by the Wayside

    The deal on disk fragmenting

  • Too many SAN islands

    by  Jeff Moad

    One of the main challenges to growing SANs is the proliferation of independent SAN islands. We look at how and why a multinational financial services company consolidated many islands into larger ones, but stopped short of a single, unified SAN.

  • Sane strategies for SAN growth

    What's the right way to design storage networks for growth? There's no simple answer to that question, but understanding the implications of storage- or network-centric approaches will help you make the right choices.

  • New directions for switches

    With all of the recent acquisitions and new partnerships forming this year, finding the right Fibre Channel switch for you is even more confusing. This article will help you chose the right one.

Columns in this issue