> I don't know how helpful this will be because I'm not sure exactly what > you mean by it not seeing your storage (there are many layers you could be >referring to), It seems to be a fabric issue. When I re-connect everything over to regular FC hub's, everything's fine, storage shows up on all nodes. When I re-connect the nodes to the McData fabric switch, no storage shows up. > Third, make sure your /etc/lvm/lvm.conf isn't filtering out the device, > thereby making it invisible as far as lvm is concerned. A line like this: > filter = [ "r/sdc/", "r/disk/", "a/.*/" ] > would make /dev/sdc invisible to lvm. I have the default which seems to allow everything. filter = [ "a/.*/" ] Other's are commented out. # filter = [ "r|/dev/cdrom|" ] # filter = [ "a/loop/", "r/.*/" ] # filter =[ "a|loop|", "r|/dev/hdc|", "a|/dev/ide|", "r|.*|" ] # filter = [ "a|^/dev/hda8$|", "r/.*/" ] > Next, check your /etc/lvm/lvm.conf for locking_type = 2. > You'll need that to share access to the SAN on the cluster. Yes, locking_type = 2 is in there. > Next, make sure your clvmd service is started. If not, do: > service clvmd start (and perhaps chkconfig clvmd on). Yes, it's running. I can't get to any of the following since the storage is not seen; > Next, try a vgchange -aly and vgscan to get clvmd to look again for it, > pvcreate /dev/sdc > vgcreate mikes_vg /dev/sdc > lvcreate -L 39G mikes_vg yup, I can do all of the above when I can see the storage by using the FC hub's but the McData is not allowing the storage to be seen. > I hope this was helpful. If not, post which part you're stuck on. Yes, that's all helpful, a nice order of things to check. I'm looking on the RH site trying to find reasons why a fabric switch might make a difference and not allow the storage to be seen. Mike -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
