Ask the Expert

Availability during migration

There has been talk of appliances that provide non-disrupted access to NAS storage during data migration that avoids scheduling downtimes and other manual tasks. Which vendors offer this functionality? How large of a problem is this for enterprises and would they be willing to pay for a product like this?

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Some vendors do offer the availability during migration. Network Appliance and EMC both state that they do and they have the majority of the market share. Other vendors may as well but I would check the details before trying it (I don't recall off the top of my head which ones do.) Some vendors have a very good business reason to do this, not the least of which is exporting information to other locations. There are many reasons and not all the same so you'll need to examine the business requirements.

By asking if customers are willing to pay for this, I'm puzzled as to what your purpose is. Some indeed will be willing to pay for it. Many would not or would negotiate as part of a volume purchase.

Randy Kerns
Evaluator Group, Inc.

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This was first published in October 2002

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