I THINK (though am not sure, and do NOT understand why) that the FCP driver in Linux must support NPIV, so check if your RH release has NPIV support for FCP.
-- R; <>< On Wed, Jun 23, 2010 at 12:53, Robert J McCarthy <bob.mccar...@custserv.com> wrote: > Rick, > Thank you for the quick response. We did receive the "busy" message in > additions to the "erp failed" message when I had both linux guests defined to > the same channel path. When using different channel paths the "busy" message > went away. As far as NPIV, we have NPIV turned on at the Brocade switch > level, but it is not turned on at the zVM lpar level. We just tried the same > fcp setup with two linux guests running SUSE10SP2 on the same vm lpar. It > works without errors under SUSE linux. So it looks like the problem is with > Redhat linux. We are going to research that avenue next. > Thank you, Bob > > -----Original Message----- > From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On > Behalf Of Richard Troth > Sent: Wednesday, June 23, 2010 12:26 PM > To: IBMVM@LISTSERV.UARK.EDU > Subject: Re: Shared fcp with two linuxguests > > For the problem you describe, I would expect a specific "busy" message. > >> tdcrac02 kernel: zfcp: unit erp failed on unit 0x0020000000000000 on >> port >> 0x5001738001820141 on adapter 0.0.8001 > > In any case, are you using a shared physical FCP adapter? You'll then also > need NPIV. > > Without NPIV, a single physical FCP adapter presents one WWPN to the SAN, for > all LPARs using it and for all subchannels on it. With NPIV, you get a > different (virtual) WWPN for each subchannel on each LPAR. > > If you DO have NPIV in place, then check that the storage is zoned and mapped > to both (virtual) WWPNs (per path), one for each of the guests. > Probably obvious to you, so no offense, but it's easy to miss. > > -- Rick; <>< > > > > > > On Wed, Jun 23, 2010 at 10:13, Robert J McCarthy <bob.mccar...@custserv.com> > wrote: >> We are planning to set up an Oracle RAC environment with two linux >> guests on the same vm lpar. They will be accessing the same fcp disk. >> The problem that we are having is as as follows: >> The 1st guest is booted. An "lszfcp -D" command displays all of the >> expected information including the WWPN and lun of the san. >> The 2nd guest is booted. An "lszfcp -D" command will show the WWPN of >> the san, but not the lun information for the san. The following error >> is also found in the linux log >> tdcrac02 kernel: zfcp: unit erp failed on unit 0x0020000000000000 on >> port >> 0x5001738001820141 on adapter 0.0.8001 >> We are running zVM 5.4 and Redhat 5.4 of linux. The fcp disks are >> assigned a separate channel path for each guest through DEDICATE >> statements in VM. Any ideas ? >> Thank you, Bob >> >
