Bob -- You said:
> NPIV is not turned on at the lpar level, but it is turned on at the SAN > level. If you're sharing the same physical FCP adapter(s) between the two Linux guests, then you probably need NPIV (at the LPAR level). I cannot imagine how your other Linux guests are able to share a LUN if the storage frame sees the same Linux-side WWPN (FCP WWPN). Since you indicated that your SuSE guests *can* share a LUN between them, I have to ask if they are using different physical FCP adapters or if there is NPIV in play for the FCP adapter(s) they are using. What's the deal there? The only time I have been able to share a LUN, the storage frame has always seen different "HBA-side" WWPNs, whether physically different FCP adapters or with NPIV. Try reversing the order in qhich the guests are brought up to test things. -- Rick; <>< On Thu, Jun 24, 2010 at 10:43, Bob McCarthy <[email protected]> wrote: > We are planning to setup an Oracle RAC environment with two linux guests > on the same vm lpar. They will be accessing fcp disk. The problem is as > follows: > 1. Guest 1 is brought up. "lszfcp -D" command will show the wwpn and lun > as expected > 2. Guest 2 is brought up. "lszfcp -D" command shows nothing. "lszfcp -P" > command will show the wwpn > Looking at the error log in linux we see the following messages : > Jun 21 15:36:52 tdcrac02 kernel: zfcp: The adapter 0.0.8001 reported the > following characteristics: > Jun 21 15:36:52 tdcrac02 kernel: zfcp: Switched fabric fibrechannel > network detected at adapter 0.0.8001. > Jun 21 15:36:52 tdcrac02 kernel: zfcp: unit erp failed on unit > 0x0020000000000000 on port 0x5001738001820141 on adapter 0.0.8001 > We are running zVM V5.4 and RedHat linux v5.5. The fcp disk is assigned > separate channel paths in each guest through DEDICATE statements in vm. > NPIV is not turned on at the lpar level, but it is turned on at the SAN > level. Additionally, we have set up two guests with the exact same > configuration, but using SUSE 10SP2. This configuration has no problems > sharing the SAN disk. Is there configuration in RedHat that must be done > that would be different from SUSE ? > Thank you, Bob > > ---------------------------------------------------------------------- > 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/
