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Virtual storage is the pooling of physical storage from multiple network storage devices into what appears to be a single storage device that is managed from a central console. ... The benefit of virtualization is that commodity hardware or less-expensive storage can be used to provide enterprise-class functionality.
Related links and additional reading
Virtual Memory is stored in secondary storage, typically on the hard drive and is used when the RAM is full. Because the hard drive is much slower than the RAM it takes the CPU much longer to get to this information.
Virtual Storage offer from IBM - Example: https://www.ibm.com/it-infrastructure/storage/flash/offers/uk-en