4 Replies Latest reply: Jun 11, 2013 11:35 PM by Mahir M. Quluzade RSS

    Disks not visible

    Vikash Jain (DBA )

      Hi,

       

           I am having rhel6 64 bit installed and i want to install oracle 11.2.0.3 64 bit Grid and DB both , but i don't know how to configure scsi device for installing oracle grid. When i am installing Grid infrastructure the disks are not showing and i don't know how to resolve this ? Can anyone help me how to resolve this issue ?

       

      Here are some output:

      [root@rhel6@xxxdomain /]# df -h

      Filesystem            Size  Used Avail Use% Mounted on

      /dev/sda2             7.9G  4.3G  3.3G  57% /

      tmpfs                 751M  772K  750M   1% /dev/shm

      /dev/sda1              15G  7.1G  7.0G  51% /u01

      [root@rhel6@xxxdomain /]# fdisk -l

       

      Disk /dev/sda: 26.8 GB, 26843545600 bytes

      255 heads, 63 sectors/track, 3263 cylinders

      Units = cylinders of 16065 * 512 = 8225280 bytes

      Sector size (logical/physical): 512 bytes / 512 bytes

      I/O size (minimum/optimal): 512 bytes / 512 bytes

      Disk identifier: 0x00046c8f

       

         Device Boot      Start         End      Blocks   Id  System

      /dev/sda1               1        1959    15728640   83  Linux

      /dev/sda2   *        1959        3003     8387584   83  Linux

      /dev/sda3            3003        3264     2097152   82  Linux swap / Solaris

       

      Disk /dev/sdb: 16.1 GB, 16106127360 bytes

      255 heads, 63 sectors/track, 1958 cylinders

      Units = cylinders of 16065 * 512 = 8225280 bytes

      Sector size (logical/physical): 512 bytes / 512 bytes

      I/O size (minimum/optimal): 512 bytes / 512 bytes

      Disk identifier: 0xeebb74e6

       

         Device Boot      Start         End      Blocks   Id  System

        /dev/sdb1               1        1958    15727603+  83  Linux

       

       

      Thanks & Regards,

      Vikash Chauradia

        • 1. Re: Disks not visible
          Mahir M. Quluzade

          Hi,

           

          Did you discovered iscsi disks before?

          You can use : iscsiadm --mode discoverydb --type sendtargets --portal <your iSCSI IP address> --discover


          Regards

          Mahir M. Quluzade

          • 2. Re: Disks not visible
            Vikash Jain (DBA )

            Hi Mahir,

             

                    Thanks for your valuable time i did the same as u mentioned , but still disk is not showing ..

            here is the output attached:

            [root@rhel6@olamdomain ~]# iscsiadm --mode discoverydb --type sendtargets --portal 10.190.x.150 --discover

            Starting iscsid:                                           [  OK  ]

            10.190.x.150:3260,1 iqn.2006-01.com.openfiler:tsn.vkcasm

            10.190.x.150:3260,1 iqn.2006-01.com.openfiler:tsn.linxfra --> this Target i want to use .

             

            Please Guide me how to do now?

             

            Thanks & Regards,

            Vikash Chauradia

            • 3. Re: Disks not visible
              SAML.

              Hi,

               

              Depend on how you connect your shared storage, if you use iSCSI, then you need to use iSCSI commands to discover disks, if you use SCSI, then you will need a different set of commands.

               

              You can try this command for discover SCSI disks.

               

              echo '- - -' > /sys/class/scsi_host/host?/scan


              SAM L.

              • 4. Re: Disks not visible
                Mahir M. Quluzade

                What is showing  fdisk - l?

                I think now you  can see other disks, sdb, sdc .. in list of disks.

                Now you must crerate ASM Disks on new disks.

                 

                Regards

                Mahir M. Quluzade