Quoting from the IBM official announcement:
IBM today announced that its flagship storage virtualization solution — IBM System Storage SAN Volume Controller (SVC) — has been certified by VMware for use in conjunction with VMware Infrastructure.
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In independent benchmarks designed and audited by the Storage Performance Council, IBM’s SVC is the highest performing benchmarked storage virtualization solution in the world today — with speeds over 75 percent above its predecessor. Through working with IBM directly or with its strategic business partners, implementing SAN Volume Controller unlocks proprietary holds vendors have had on customers for years, having the capabilities to virtualize across disparate hardware vendors systems…