I should have said you will probably need to use SET EDEV .. CLEAR to delete the last path -- it may even remove them all - but as I've never issued it myself - I'm not sure. When I've messed with things it was to vary off particular paths - not get rid of the whole device. You can DEFINE/DELETE EDEVICE --- but I'm fairly sure that with SET EDEV DELETE PATH and CLEAR --- and conversely, ADD PATH ... you should be able to release the subchannels without necessarily redefining the EDEVICE and just dealing with the paths.
On Thu, Jun 4, 2015 at 2:13 PM, Scott Rohling <scott.rohl...@gmail.com> wrote: > Use SET EDEV commands to delete all the paths defined over the FCP > subchannels... Then use SET EDEV to define them all back when done.. > A simple EXEC to do one or the other or both will save your fingers if you > need to do this more then once. > > Scott Rohling > > On Thu, Jun 4, 2015 at 2:07 PM, kwg <kw...@yahoo.co.uk> wrote: > >> There is no zoning. These are all development systems used only by the >> z/vm and its linux guests. It was a machine upgrade rather than a new >> machine and the NPIVs for the z/vm systems were preserved. I did check them >> and I will check again but all the linux systems did start ok initially. >> The physical WWPNs may have changed, especially if they are associated with >> the ficon cards, which were permitted during the upgrade. >> >> Btw can anyone tell me how I can stop the EDEV devices so that I can vary >> the Chris's offline without shutting down z/VM (which has some z/os guests). >> >> Keith >> >> >> >> >> > On 4 Jun 2015, at 21:30, David Kreuter <dkreu...@vm-resources.com> >> wrote: >> > >> > Hi Keith: Check the zoning and the NPIVs. The NPIVs presented to SVC >> > from the BC12 could have changed. >> > David Kreuter >> > >> > >> > -------- Original Message -------- >> > Subject: Problems with SCSI-over-FCP after machine upgrade >> > From: Keith Gooding <kw...@yahoo.co.uk> >> > Date: Thu, June 04, 2015 4:21 pm >> > To: LINUX-390@VM.MARIST.EDU >> > >> > This may not be the proper forum but maybe someone can help. >> > We have a small number of linux systems (<32) under z/VM 6.3 which use >> > SCSI connections to LUNs on a SAN Volume Controller via a couple of IBM >> > SAN24B switches (the equivalent of Brocade 300). There are also some >> > systems which use EDEVs on the same SVC. This had worked on z10 BC for >> > about 5 years without problems. >> > Last week the z10 was upgraded to a zBC12, retaining the same FICON >> > cards (4Gbs), but not necessarily associated with the same CHPIDs. Since >> > then a number of the LUN connections have been 'lost', cauing linux >> > systems to fail. SCSIDISC displays eg "HCPRXS975I Virtual FCP device >> > 1A05 ignored because the adapter was not able to connect to the fibre >> > channel network". It is then not possible to rebot the linux system. >> > >> > Restarting 'everything' - ie SVC nodes, SAN switches, CHIPD vary off/on >> > - cleared the problem for a while. >> > Any ideas where to start looking ?. I have discovered that we have > 32 >> > FCP subchannels defined on the CHPID (but highest used unit address is >> > 1f, and there are only about a dozen in use). Also the switch has not >> > been 'qualified' for use on z12 (but it appears that it was not >> > qualified for z10 either). >> > Any advice greatly appreciated ! >> > >> > >> > ---------------------------------------------------------------------- >> > For LINUX-390 subscribe / signoff / archive access instructions, >> > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 >> or >> > visit >> > http://www.marist.edu/htbin/wlvindex?LINUX-390 >> > ---------------------------------------------------------------------- >> > For more information on Linux on System z, visit >> > http://wiki.linuxvm.org/ >> > >> > ---------------------------------------------------------------------- >> > For LINUX-390 subscribe / signoff / archive access instructions, >> > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 >> or visit >> > http://www.marist.edu/htbin/wlvindex?LINUX-390 >> > ---------------------------------------------------------------------- >> > For more information on Linux on System z, visit >> > http://wiki.linuxvm.org/ >> >> ---------------------------------------------------------------------- >> For LINUX-390 subscribe / signoff / archive access instructions, >> send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or >> visit >> http://www.marist.edu/htbin/wlvindex?LINUX-390 >> ---------------------------------------------------------------------- >> For more information on Linux on System z, visit >> http://wiki.linuxvm.org/ >> > > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
