Yes, IBM z hardware and z/OS properly sysplexed can achieve many 9s of reliability. I don't think this is in dispute. But, computers are tools that perform useful things for people. It should be clear that actual availability of application function at the outside endpoints is not nearly as many 9s. It's fairly clear that even IBM support sites don't run solely on Sysplexed zHardware under z/OS achieving lot's of 9s.
I suspect a few LPARs in Sysplex over a couple CECs running nothing but z/OS would never need to come fully down. An expensive POC, but also pretty useless. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
