Serviceguard configuration issues with PVs

[Darius Shafie]

I am having problems performing the initial configuration of SG on a two node setup.

I have three Alternate Link enabled VGs that I have distributed to both nodes and verified that both nodes can activate the VGs mount the fs and access the data. I dont have the VGs activated on both nodes at the same time of course. The issue is that I get a message that one of the VGs called vgcls02 does not have the same PV configuration on both nodes. This is absolutely the case as the actual disks are being assigned to both nodes through a SAN fabric, so there is no way I can control the physical address of the primary and alternate PV in a VG on either node. On the configuration node the PV address are (P)c136t0d2 and (A)c137t0d2 and on the second node the PV address are (P)c86t0d2 and (A)c85t0d2.

I guess the my question would be how can I resolve this issue?

[Steven E. Protter]

Shalom darius,

Please provide the command that is failing and the response/error message.

SEP

[A. Clay Stephenson]

This is not a problem as it would be rather difficult to get the same physical device names on two nodes and the problems only get worse with the number of nodes. The only thing that matters is that the volume group be named the same on all nodes and that the same physical disks or LUN's are indeed referenced by each host regardless of the pathname of the disks or LUN's.

[Darius Shafie]

Hi Im a newbe to HPUX and have brought myself up to speed a bit, but dont know how to do a bunch of things. Im using SAM to configure the cluster configuration, how I can output the commands SAM gives and the error messages?

Thanks.

[Darius Shafie]

Clay,

Through much trial and error, I learned that I needed to have the same VG names on both nodes with the same minor numbers. I successfully distributed the VGs from one node to the next and been able to import, activate and mount the LVs on the second node.

Its just that when I choose to do the cluster configuration in SAM I got multiple errors. First it complained about the CD device in one of the nodes, so I removed the special file for the CD device and resolved that error. Next it gave me an error that the physical disks for vgcls02 are not configured the same on both nodes. I figured this was referring to the fact that the device paths have different addresses.

I'm not doing PVG-strict mirroring and dont know how to resolve this issue.