We've been mirroring our DASD with Global Mirror for several years (and SRDF before that). Our policy currently is to mirror everything. No problems at all. And it makes it a lot easier when you get to DR--there's no issue of "oh well that dataset we need for production really happens to be on a dev/test volume".
IIRC, in the early days (~10 years ago, with SRDF) we did keep page volumes out of mirroring, at least for the two-hop solution where we did sync replication to a local bunker and async from there. But we even let those go now. I'm 100% sure we always did the spool. I'm 95% sure we always did the JES checkpoint, but primary checkpoint is in the CF. Scott ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
