when the request is media related. This control switch determines whether
SIMs are sent to all, or to only the first, attached IBM Z LPAR making an
I/O request to the logical system or logical volume.
IBM Z high-performance FICON enhanced buffer management
IBM Z high-performance FICON enhanced buffer management provides
improved performance for multi-site configurations when writing data
remotely (remote site recovery).
Chapter 7. Storage complex setup 177