> What is the status of multiple preferred guests on z990 machines? > iirc the z990 cannot run in basic mode, which was always a prereq > for multiple preferred guests. When running under PR/SM the MHPGF > would be taken by PR/SM. Running multiple preferred guests will > require something like 2nd level zones, unless PR/SM has changed > such that it no longer uses the MHPGF.
Jan: Unfortunately, you loose support for V=F guests on the z990. With the complexity of the I/O subsystem (two logical channel sets, 512 channels) LPAR mode became mandatory to manage the environment. If you have images that really require the level of performance provided by V=R/V=F support, you should probably run those directly in an LPAR. With 30 LPARs, you have support for more "native" systems than before. Jim
