Learn Database Concepts

[root@rac1 Desktop]# cd /dev [root@rac1 dev]# ls sd* sda  sda1  sda2  sdb  sdb1  sdc  sdc1  sdd  sdd1  sde  sde1  sdf  sdg [root@rac1 dev]# /usr/sbin/oracleasm listdisks DISK1 DISK2 DISK3 DISK4 [root@rac1 dev]# fdisk /dev/sdf Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel with disk identifier 0xd8725891. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable. Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) WARNING: DOS-compatible mode is deprecated. It's strongly recommended to          switch off the mode (command 'c') and change display units to          sectors (command 'u'). Command (m for help): n Command action    e   extended    p   primary partition (1-4) p Partition num...

Here is the step by step process on how to add diskgroup to existing ASM instance via ASMCA. on cmd prompt set the ASM insatance and then invoke asmca. by using below cmd. $ asmca

                                        vboxmanage command line  For our scenario : Lets create shared disks (vdi) on Virtualbox for ASM setup.  If you are getting error like below make sure you have virtual-box set in your environmental path: In my case I have to add "C:\Program Files\Oracle\VirtualBox\" to my path. To add it to your environmental path goto : Startup >> computer (right click) >> properties >> advanced system settings >> environmental variables >>   Click on start Right click on Computer Click Properties Click Advanced system settings Click Environment Variables Go to system variables find Path and edit it add your file location at the end of the box. Add your virtual box installed path, usually c\programe files \ oracle Now test the vboxmanage cmd : You will get something like this if you have any virtual machines cr...