Re: z9 over-heating prevention
One of the more interesting attributes is that the machine will do everything possible to keep your work moving as best it can even if there's a double MRU failure. It can slow down the processors to reduce heat. WLM (assuming z/OS) is still in control, so heat-related forced slowdowns will tend to disfavor work in lower service classes, starting with purely discretionary workloads. You're probably already monitoring how well WLM is meeting its goals, so that's one (indirect) way to get a warning that something unusual is happening. I think an MRU failure is a Call Home event, by the way. A technician is going to initiate a telephone call to schedule installation of a replacement part, if necessary. If you're visiting IBM (in Poughkeepsie, for example), they may be able to simulate a double MRU failure for you so you can see what happens, at least if you request that demonstration ahead of time. - - - - - Timothy Sipples IBM Consulting Enterprise Software Architect Specializing in Software Architectures Related to System z Based in Tokyo, Serving IBM Japan and IBM Asia-Pacific E-Mail: [EMAIL PROTECTED] -- 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
Re: z9 over-heating prevention
This kind of also ties into the *gas gauge* available for z9 with driver upgrade. I thought this little pdf interesting. ftp://ftp.software.ibm.com/systems/z/pdf/z9_Gas_Gauge_Driver_manual.pdf under http://www-03.ibm.com/systems/z/advantages/energy/index.html Timothy Sipples [EMAIL PROTECTED] wrote: One of the more interesting attributes is that the machine will do everything possible to keep your work moving as best it can even if there's a double MRU failure. It can slow down the processors to reduce heat. WLM (assuming z/OS) is still in control, so heat-related forced slowdowns will tend to disfavor work in lower service classes, starting with purely discretionary workloads. You're probably already monitoring how well WLM is meeting its goals, so that's one (indirect) way to get a warning that something unusual is happening. I think an MRU failure is a Call Home event, by the way. A technician is going to initiate a telephone call to schedule installation of a replacement part, if necessary. If you're visiting IBM (in Poughkeepsie, for example), they may be able to simulate a double MRU failure for you so you can see what happens, at least if you request that demonstration ahead of time. - - - - - Timothy Sipples IBM Consulting Enterprise Software Architect Specializing in Software Architectures Related to System z Based in Tokyo, Serving IBM Japan and IBM Asia-Pacific E-Mail: [EMAIL PROTECTED] -- 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
Re: z9 over-heating prevention
Google IBM z9 cooling. Also check out http://www.research.ibm.com/journal/rd/511/harrer.pdf. The z9 has a MRU, modular refrigeration unit. Joel M Ivey [EMAIL PROTECTED] wrote: What safety guards are there on z9bc hardware to prevent over-heating? (Such as when the building's coolers are inoperable.) Are there messages to console to prompt for shutdown? I searched for white paper, flash, archives, etc. Thanks, Joel M Ivey University of SC -- 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 -- 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
Re: z9 over-heating prevention
Thanks, Patrick. The link, btw, is harrer.html . On Tue, 25 Mar 2008 06:14:16 -0700, Patrick Falcone [EMAIL PROTECTED] wrote: Google IBM z9 cooling. Also check out http://www.research.ibm.com/journal/rd/511/harrer.pdf. The z9 has a MRU, modular refrigeration unit. Joel M Ivey [EMAIL PROTECTED] wrote: What safety guards are there on z9bc hardware to prevent over-heating? (Such as when the building's coolers are inoperable.) Are there messages to console to prompt for shutdown? I searched for white paper, flash, archives, etc. Thanks, Joel M Ivey University of SC -- 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 -- 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 -- 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
Re: z9 over-heating prevention
No, my mistake. It's either pdf or html. On Tue, 25 Mar 2008 08:45:11 -0500, Joel M Ivey [EMAIL PROTECTED] wrote: Thanks, Patrick. The link, btw, is harrer.html . On Tue, 25 Mar 2008 06:14:16 -0700, Patrick Falcone [EMAIL PROTECTED] wrote: Google IBM z9 cooling. Also check out http://www.research.ibm.com/journal/rd/511/harrer.pdf. The z9 has a MRU, modular refrigeration unit. Joel M Ivey [EMAIL PROTECTED] wrote: What safety guards are there on z9bc hardware to prevent over-heating? (Such as when the building's coolers are inoperable.) Are there messages to console to prompt for shutdown? I searched for white paper, flash, archives, etc. Thanks, Joel M Ivey University of SC -- 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 -- 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 -- 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 -- 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
Re: z9 over-heating prevention
There is a message about the temperature threshold posted to the HMC under hardware messages. -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Joel M Ivey Sent: Tuesday, March 25, 2008 8:46 AM To: IBM-MAIN@bama.ua.edu Subject: z9 over-heating prevention What safety guards are there on z9bc hardware to prevent over-heating? (Such as when the building's coolers are inoperable.)Are there messages to console to prompt for shutdown?I searched for white paper, flash, archives, etc. Thanks, Joel M Ivey University of SC -- 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 == Please access the attached hyperlink for an important electronic communications disclaimer: http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html == -- 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
