On Tuesday, 12/16/2008 at 11:44 EST, Kris Buelens <kris.buel...@gmail.com> wrote: > But, using simulated FBA minidisks incur higher CP overheads that > letting Linux use the FCP channels.
The question was how does RACF protect FCP. If you want RACF to protect access to LUNs there is no choice but to use minidisks. And THAT means FBA or ECKD. Depending on how the particular disk is used, the CP overhead may be important or it may not. Further, z/VM 5.3 significantly reduced the CPU overhead of paging to SCSI. Read http://www.vm.ibm.com/perf/reports/zvm/html/530scsi.html. Alan Altmark z/VM Development IBM Endicott
