Older Z/VSE Versions
Since z/VSE 3.1, Fibre Channel access to storage devices is supported, although only on IBM's Enterprise Storage Server (ESS) and its successors. z/VSE 3.1 is still compatible with 31-bit mainframes, as opposed to z/VSE 4. This version was supported to 2009.
A previous generation, VSE/ESA 2.7, is no longer supported since February 28, 2007.
Read more about this topic: VSE (operating System)
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