2 Replies Latest reply: Dec 9, 2012 3:40 PM by user13166809 RSS

    Physical disks in Oracle VM Manager 3.0.3

    user13166809
      We're building a 3-node clustered server pool in Oracle VM 3.0.3 using IBM x3650 M4's and 24 disks in an EMC VNX5500 storage array (for which there is no storage connect plugin). We discovered the servers successfully, but on the "physical disks" tab, the disks were names DGC(1), DGC(2), etc. I'd like to know how those map back to the physical LUN's on the array. I don't see a WWID anywhere in the VM Manager. Is there a mechanism to do this? The sizes don't help because many of them are the same size.

      Thanks for your help.
        • 1. Re: Physical disks in Oracle VM Manager 3.0.3
          budachst
          If you chnage to the storage tab in OVM Manager an click on the little triangle right left to your storage item, you will see the name of that item,which is also the path where this LUN is mounted under /dev/mapper/name

          You could then switch to your VM server and issue a multipath -l to see which LUN is mounted on what path. For example, on my OVMM one of my iSCSI LUNs is named:

          1494554000000000041534d535256504f4f4c000000000000 and it's mounted under /dev/mapper/1494554000000000041534d535256504f4f4c000000000000

          multipath -l on one of my VM servers, where this target is connected gives me this:

          [root@oraclevms05 ~]# multipath -l
          1494554000000000041534d535256504f4f4c000000000000 dm-4 IET,VIRTUAL-DISK
          size=100G features='0' hwhandler='0' wp=rw
          `-+- policy='round-robin 0' prio=1 status=active
          |- 12:0:0:0 sdf 8:80 active ready running
          `- 11:0:0:0 sde 8:64 active ready running


          So you can see, that this is a multipathed target on sdf and sde. Now, running ls -l /dev/disk/by-path shows me which target this is connected to:

          [root@oraclevms05 ~]# ls -l /dev/disk/by-path/
          total 0
          lrwxrwxrwx 1 root root 9 Nov 26 14:58 ip-10.11.15.16:3260-iscsi-iqn.2012-08.de.jvm:asmstorage02:asmvmserver-lun-0 -> ../../sde
          lrwxrwxrwx 1 root root 9 Nov 26 14:58 ip-10.11.15.5:3260-iscsi-iqn.2012-08.de.jvm:asmstorage01:asmvmserver-lun-0 -> ../../sdf
          • 2. Re: Physical disks in Oracle VM Manager 3.0.3
            user13166809
            GREAT! Thanks so much! That's exactly what I was looking for.