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Vol. 2 No. 1 March 2003

Cheap DR with Wireless MAN

Synchronous replication between remote EMC Symmetrix arrays isn't cheap. So when Cleveland-based Ohio Savings Bank built its disaster recovery site, it eyed telecommunications as a place to cut costs. "The big problem with synchronous replication is that you need a really fat pipe," says Donald Janosik, senior network engineer at OSB. Instead, OSB went for a dedicated Gigabit Ethernet connection, with redundant CNT UltraNet Edge FCIP routers. This cost OSB about 9% more than a 44Mb DS3 link, but provided 22 times the bandwidth, Janosik says. DS3 does have its advantages, says Karl Evert, partner marketing manager at CNT. Because SONET is a ring, data traffic can be rerouted if a link goes down. With Ethernet, "if a backhoe goes through your line, you're out of luck." To guard against that, OSB installed Cisco's wireless WT2710 point-to-point broadband system. The beauty of wireless? Besides the equipment, there are no monthly communications charges. Installation wasn't without its challenges, though. "We had to raise the masts ...

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Features in this issue

  • Tap the SAN for File Storage

    Used to be, if you wanted to give users a central place to store files, you had two options: put them on a generic file server, or on a NAS device.

  • Sony Joins Super Drive Game

    The market for super drives is alive and kicking, according to a recent report from Freeman Reports, with unit shipments more than doubling from 2001 to 2002.

  • Symmetrix DMX: Is it Hot or Not?

    The year is still young, but EMC's Symmetrix DMX announcement is arguably 2003's biggest storage story.

  • Surveillance Gradually Going Digital

    Security-conscious companies who started out using analog videotapes, are gradually making the switch to digital, offloading to digital tape and occasionally, cheap ATA disk.

  • Ease backup pain

    OK, maybe there's no cure, but a variety of bandages and pills can help. We look at the major backup packages and analyze what each does best.

  • Bring DBAs into the SAN era

    by  Jim Booth

    You may not want DBAs poking around inside your fabric, but the more they understand about SANs, the better they'll be.

Columns in this issue