On Wednesday, 05/26/2010 at 10:06 EDT, Bob Atton <bob.j.at...@rrd.com> wrote: > We have had a very strange and unusual message today on our z/VM 5.4 system. > > I had a report that our zLinux guests were not accessible (putty, ping, ssh all > no good). I logged on to MAINT OK but soon after when I had issued a command I > got the following messages. > > 10:29:47 * MSG FROM MAINT : DMSITM319T Machine check interrupt was > encountered; MCIC = X'4002AFBD 400B0000 00000000 00000000'
40 = System processing damage 02 = Backed up That means that the CPU had an error and 'backed up' to the most recent internal consistent checkpoint, avoiding damage to memory, registers, timers, or the PSW. The condition is fatal. > CMS would not IPL but I could IPL 190. > > When I tried to start the zLinux guests they initially failed with the messages > above because they IPL CMS but when I IPLed 190 and ran the profile etc to > start linux I saw > > HCPMCV1459E The virtual machine is placed in check-stop state due to a system > malfunction with CPU 00. > > After a while we IPLed the VM system and all appears to be OK. I'm fuzzy on how CPU sparing and recovery work, and I don't know why you couldn't IPL an NSS. Certainly you should check the HMC for hardware messages. It likely called home. Alan Altmark z/VM Development IBM Endicott
