As Parwez correctly pointed out, z/OS's SMT 2 is limited to zIIPs. Since you cannot have an LPAR with only a zIIP (you could not IPL it), you therefore cannot have an LPAR with only a single CPU running z/OS that is able to use SMT. You could write your own operating system that allows that.
The doc does not suggest otherwise. The values allowed are shown: MT_CP_MODE=1 MT_ZIIP_MODE=1|2 Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
