Lu, An MCF is an acronym for "Microcode Fix". Sometimes multiple MCFs are grouped together into a microcode level (MCL). It's just packaging jargon for System z firmware. Typically, you work with your IBM CE or some other support person.
There really isn't enough information to determine where the problem is. Personally, I would need to see hardware logs as a part of some field problem to determine that. The only thing I really know is that the channel firmware is flagging some error in the qdio code. It might be a linux problem, a VM problem, a millicode problem, or a channel problem. I just don't know from the limited amount of data. I and the rest of the list can only brainstorm some potential action items. Some of them you can investigate yourself, like maybe using fewer subchannels changes timing enough to work around the problem until the real problem is figured out. Others, involve getting expert help, like applying the latest firmware by engaging your support provider. Maybe some Linux, or VM person will comment tomorrow and provide additional insight from their point of view. Regards, Ray Higgs System z FCP Firmware Development Bld. 706, B42 2455 South Road Poughkeepsie, NY 12601 (845) 435-8666, T/L 295-8666 [email protected] Linux on 390 Port <[email protected]> wrote on 09/19/2011 06:41:17 PM: > From: Lu GL Gao <[email protected]> > To: [email protected] > Date: 09/19/2011 06:49 PM > Subject: Re: zfcp disk error > Sent by: Linux on 390 Port <[email protected]> > > What is MCF for Ficon card? How to get that level? > > What is the key reason to cause our problem, missing a MCF? or using too > much(more than 32) sub-channels in NPIV mode? > > ---------------------------------------------------------------------- > 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/ > ---------------------------------------------------------------------- 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/
