On 20 April 2010 12:39, Tony Harminc <[email protected]> wrote: > On 20 April 2010 12:35, Mark Zelden <[email protected]> wrote: > >> There is also a QUIESCE command, which puts the system in a x'CCC' >> wait state that is restartable. You wouldn't want to normally do that >> these days. > > Why?
I didn't phrase my question clearly; I wasn't asking about the wisdom of trying to restart, but about why the QUIESCE itself would be a bad idea. The original reason for QUIESCE, IIRC, is that it ensured that all CPUs in an MP would be stopped, whereas the old "hit STOP" would stop only the one whose STOP button you pressed. And in turn, the reason for hitting STOP before re-IPLing is to avoid that improbable but very nasty possibility of doing an I/O reset while a DASD write was in progress (for your JES checkpoint, say). Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
