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The IBM XIV Storage System is built as a grid-based storage system of independent modules. The modules are implemented using off-the-shelf, Intel-based servers within a customized, Linux-based architecture, and are interconnected over redundant Gigabit Ethernet switches. The modules act jointly as a large data grid devoid of a common backplane. The grid is managed by sophisticated distributed algorithms and delivers enterprise-class performance, reliability, and functionality. The IBM XIV system is built modularly, from the following components: Data modules - The data modules are Intel-based servers with a large number of disks. The modules store the data and perform all advanced storage functionality, such as redundancy, snapshots, and caching. Gigabit Ethernet switches - the switches are the interconnect between all the data and interface modules. UPS units - the UPS units ensure that the XIV system has enough time to de-stage all cached data upon a power outage.
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