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Sunday, May 10, 2015

Unable to select Disks while creating Disk Groups - Grid Installation

Just got stuck in a situation where I was not able to select Disks to create ASM Disk Groups while Installation of Oracle 11g R2 Grid Infrastructure.





I came to a workaround -  I had to re-created all Oracle ASM disks from scratch.


Dropped existing Disks:
--------------------------------

[root@ora11gsrv disks]# oracleasm deletedisk DISK1
Clearing disk header: done
Dropping disk: done

[root@ora11gsrv disks]# oracleasm deletedisk DISK2
Clearing disk header: done
Dropping disk: done

[root@ora11gsrv disks]# oracleasm deletedisk DISK3
Clearing disk header: done
Dropping disk: done

[root@ora11gsrv disks]# oracleasm deletedisk DISK4
Clearing disk header: done
Dropping disk: done




List of disks available:
-----------------------------

[root@ora11gsrv disks]# fdisk -l

Disk /dev/sda: 85.8 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        4184    33607948+  83  Linux
/dev/sda2            4185        9283    40957717+  83  Linux
/dev/sda3            9284        9920     5116702+  83  Linux
/dev/sda4            9921       10443     4200997+   5  Extended
/dev/sda5            9921       10442     4192933+  82  Linux swap / Solaris

Disk /dev/sdb: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1         652     5237158+  83  Linux

Disk /dev/sdc: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1         652     5237158+  83  Linux

Disk /dev/sdd: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1         652     5237158+  83  Linux

Disk /dev/sde: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sde1               1         652     5237158+  83  Linux




Created Oracle ASM disks:
-------------------------------------


[root@ora11gsrv disks]# oracleasm createdisk DISK1 '/dev/sdb1';
Writing disk header: done
Instantiating disk: done

[root@ora11gsrv disks]# oracleasm createdisk DISK2 '/dev/sdc1';
Writing disk header: done
Instantiating disk: done

[root@ora11gsrv disks]# oracleasm createdisk DISK3 '/dev/sdd1';
Writing disk header: done
Instantiating disk: done

[root@ora11gsrv disks]# oracleasm createdisk DISK4 '/dev/sde1';
Writing disk header: done
Instantiating disk: done


[root@ora11gsrv disks]# oracleasm listdisks
DISK1
DISK2
DISK3
DISK4


[root@ora11gsrv disks]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...



Now, I am able to select Disks while creating disks groups during Grid Installation as depicted in the following snapshot.



Hope it would help someone...!!