> I have a 3PARdata SAN and I am using 2 qla2300 HBA's connected to a fabric > switch. There are a total of 2 paths to the SAN per HBA. > First off the multipath command never works for me. > ok, it seems the getuid function is not the right one for this hardware. can you track down where it stores the LU WWID ? you can try hunting for it with the sg_inq command from sg_utils. example with StorageWorks driven LUNs : sg_inq -e -o=0x83 /dev/sdb To code you the right fetching fn, I would need : o the opcode page o evpd set or not o the offset in this page <snip the nice strace> > I was able to put a filesystem on the dm-0 device that I created with > dmsetup without much trouble after I found out the that the multipath table > arguments changed. > > I didn't see much about LVM2 other than that it uses the libdevmapper > library. What I didn't see is how to access the multipath device for an > LVM2 volume. Does it automaticly know that it is part of a multipath device > when I use one of the devices that is a part of the multipath device. I would recommend blacklisting the paths in the LVM2 config file. Though, I never tried that : insights from the LVM guys would be welcome. regards, cvaroqui