We had finished multipathing work in our environment. Our problem we perviously had is caused by using too much FCP sub-channels of every one physical channel.I summarize our problem resolution below: (1)The number of FCP sub-channels(for every FCP physical channel) used should <= 32. The total number of connections for every FCP physical channel should <= 128. (note: a connection is subchannel->hba_port->LUN) (2)After prolem fixed, we had update MCF for Ficon Express card from G40938.006 to G40938.007, based on Raymond's advice. (3)Sometimes, if you add too much zfcp devices through YAST, it will be occasionally happened that wwpn list of luns can not fetched by clicking "get LUN" button. I don't know why it happens. But we can bypass it by defining few zfcp a time.
Finally, thanks everybody here to share your experience for this problem! ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] 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/
