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Article Excerpt
Many small to mid-sized companies face a seemingly insoluble problem-new eDiscovery laws that mandate they be able to capture and reproduce email traffic, but they cannot afford to comply. They either lack sophisticated archiving software, or simply cannot afford additional storage area network (SAN) storage for Microsoft Exchange. However, new email solutions are emerging that take a very different, and far less expensive, approach to storage.
Exchange's architecture is hard on storage systems because it requires about five systems operations for one send. All these writes, rewrites, and commands clog I/O, and each of those operations is stored in Microsoft's Jet database. As a result, Exchange requires storage with many fast, expensive disks-a requirement that is out of the price range of most small and medium-sized businesses.
To get around these limitations- and to deal with the need for backup windows-Exchange administrators limit the amount of storage available to users and employ fiber-channel-driven, dedicated SANs. While SANs are great storage appliances, they can drive the...
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