I have powered down and powered up whole data centers numerous times usually for electrical, power plant work, sometimes because the air conditioning failed, once for a push/pull to retreat from an early CMOS machine, which had more CP's than MIP's ;-), back to a Bi Polar machine, and never had a problem.
Coming up just be sure you sequence everything properly, peripherals first, disk, terminal controllers, network boxes, front ends first, then the mainframes. Let each of the devices go through their self-checking sequencing gradually, a few at a time. Make sure everything is up before you bring up the mainframe. The take down is in the opposite order, mainframe first then the peripherals. On Thu, Jun 17, 2010 at 12:26 PM, Pinnacle <[email protected]>wrote: > ----- Original Message ----- From: "Matan Cohen" <[email protected]> > Newsgroups: bit.listserv.ibm-main > Sent: Thursday, June 17, 2010 8:07 AM > Subject: taking down the machine - z9 series > > > Hi, >> When the situation force you to taking down the machine (due to >> Electricity >> power cut) , after taking down the lpars. >> do you perform anything else beside deactivation of the CPC ? >> i met a diffrent opinion in this matter . >> >> >> -- >> best regards, >> matan cohen >> MF System Administrator. >> >> > Matan, > > A full power-down can be problematic. I would recommend that you spend the > extra money to get an IBM FE on site to ensure that all machines are powered > down correctly. Most sites I work at haven't powered down in years, so they > do not know the procedures. Also, your older equipment may go belly up just > from the power off, power on process. I once had to move 6 3174 > controllers, and 3 of the power supplies and one of the diskette drives > failed on startup. > > Good luck, > Tom Conley > ---------------------------------------------------------------------- > 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 > -- George Henke (C) 845 401 5614 ---------------------------------------------------------------------- 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
