VIO Issue

Hi All,

I have a question about multipathing on the VIO servers which I hope
someone can help with. Basically I am trying to set up the scenario as per
the attached diagram which is from the redbook sg247940, Advanced Power
Virtualization on IBM System p5, Chapter 5, page 249.

The only difference to the diagram is that the DS4800 goes through 2 SAN
switches, one controller through each. Each fibre card on the VIO is zoned
to see only one of the controllers. I have created a host group on the
ds4800 which has the 2 fibre cards in and 12 disks assigned to the host
group. As per the diag ds4800 attached.

The issue I am having is that in this configuration, after I have done the
cfgdev on the VIO server, I am seeing 2 hdisks for the same disk (I have
checked the ieee_volname parm to be sure). In this case I have
hdisk0-hdisk28 inclusive. Hdisk0, hdisk1 and hdisk2 are the internal
disks. Not sure what hdisk3 and hdisk4 are doing here, they were present
even before I allocated and disks to the VIO. Then I have hdisk5-28 which
are the 24 paths to the 12 disks.

As per the diagram, it indicates that there should only be 1 hdisk for the
disk as the RDAC driver will have sorted out the dual path to present only
the one disk. This is the part that I am not seeing and am stuck on.
Earlier on in the chapter on page 245 there is a Note which says to use
the oem_setup_env command (which creates a root shell) for installing and
configuring the multi-path environment on the VIOs. What commands are used
in the above shell to achieve the configuration?

One other thing that I have noticed is that when listing the filesets which
are required for the RDAC there is no version number or description
associated with them, as below. Is this right? Or should there be that info?

$ lssw | grep fc
devices.common.IBM.fc.hba-api
devices.common.IBM.fc.rte
devices.fcp.disk.array.diag
devices.fcp.disk.array.rte
devices.fcp.disk.rte 5.3.0.41 A F FC SCSI CD-ROM, Disk,
devices.fcp.tape.rte 5.3.0.41 A F FC SCSI Tape Device
Software

Ioslevel on the VIOs is 1.2.1.1-FP-7.2

Thanks in advance for your replies.

Regards
Steve Copper



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