Uninstall of oracle 11gR2 RAC on linux

Hi all,
i am in learning stage, can anybody help me how to uninstall the Oracle 11gR2 RAC on linux.
thank you.

http://gruffdba.wordpress.com/2012/10/29/oracle-11gr2-rac-install-cleaning-up-a-failed-install-on-linux/
you can go through this link you will get an idea

Similar Messages

Oracle 11gR2 RAC on Linux 5

Hi,
I am trying to setup Oracle 11gR2 RAC on Linux 5.4 64-bit machine. I have used OCFS2 for creating shared disks. Encountered with the following error message while installing "Grid Infrastructure".
[INS-30014] Unable to check wether the location specified is on CFS
[INS-40103] The installer has detected that the software location specified is on an OCFS2 partition.
[IS-41312] One or more locations specified for Oracle cluster Regestry (OCR) cannot be used.
[INS-41514] One or more locations specified for placing voting disks cannot be used.
-- At the time of configuration i have created 2 share disks, 1) For Oracle software 2) For voting disk and OCR
Provided the same details at time of Clusterware installation.
Please hel me.
Thanks,

Actually for both Oracle software and OCR i have used OCFS2. bcz earlier in Oracle 11g1 RAC i did the same and able to do smooth installation Well, you can no more do that with 11gR2 and it's clearly mentioned in 11gR2 Error messages documentation that configuration of grid Infrastructure software for a cluster is not supported on OCFS2 partition. You'll need to specify a location that is not an OCFS2 partition.
Search for the error INS-40103 message at http://download.oracle.com/docs/cd/E11882_01/server.112/e10880/giinstaller_errormessages.htm
Cheers.

Oracle 11gR2 RAC on Linux

Can we install Oracle 11gR2 RAC on Linux using OCFS2 for both Oracle software and OCR.
Actually i am facing problems with Oracle software location which is on OCFS2
Please help me

Though it would be technically feasible, oracle recommends against sharing oracle binaries for RAC.
You would be better off installing oracle binaries on a local mount on all nodes rather than a shared file system.
Cheers.

Oracle 11gR2 RAC Vs Linux Version

Hi Guys
Please let me know whether i can start the Oracle 11gR2 RAC Grid installation in RHEL 6 or the higher version. Will i able to download the ASM libs for RHEL 6 n greater version. Thanks.

Hi,
You can install 11.2.0.3 on RHEL 6 or OEL 6. Please note that asmlib rpms are no more available on RHEL 6 and hence will advise to go for OEL 6. For RHEL, you have to use udev rules.
Regards,
Sharma

Oracle 11gR2 RAC on Linux - testing/practice/lab purpose

Hi Gurus,
Need your assistance & help here, I've 3 servers, equipped with almost everything, for this testing/sufficient enough; cpu, memory & hard disk.
I'm looking for some guidance/assistance or link, doc or anything, which I should follow to build this RAC and then Data Gurad environment too, successfully.
This is just for practice purpose, as last time did in 2009 and it's been quite some time, forgot a lot of stuff.
Please provide some best practices, guidelines and assistance too, enable to build it correctly and successfully too.
Thanks a lot in advance.
Best regards.

Hi,
check : http://www.oracle-base.com/articles/11g/data-guard-setup-11gr2.php
and
ORACLE-BASE - Articles on Real Application Clusters (RAC) (12c, 11g, 10g, 9i)
replace virtual server used in this article for your physical server.
i also helped you to do a google search... https://www.google.com.ng/search?q=oracle+best+practices+for+rac&oq=oracle+best+practices+for+rac&aqs=chrome..69i57j0l5.…
HTH
Tobi

Problem of Copying the Original VM to 2nd VM in Oracle 11gR2 RAC system

Folks,
Hello. I have been installing Oracle Database 11gR2 RAC system using 2 nodes that are 2 Virtual Machines (rac1 and rac2) on the top of VMPLayer 3.
I follow the tutorial http://appsdbaworkshop.blogspot.com/2011/10/11gr2-rac-on-linux-56-using-vmware.html to do.
The original Virtual Machine rac1 has run correctly. I configure rac1 network (eth0 and eth1) by opening VM rac1 and using command "[root@rac1\] #neat" as root user to invoke the network configuration.
For the second Virtual Machine rac2, I simply copy all files in "C:\VM\rac1" into "C:\VM\rac2". Then I have done the following:
1) In the directory "C:\VM\rac2", rename "rac1.vmx" to "rac2.vmx".
2) Change display name from "rac1" to "rac2" in the file "rac2.vmx".
The next thing to do for rac2 is to open the Virtual Machine rac2 and configure its network (eth0 and eth1) by using the command "[root@rac2\]#neat" as root user.
But by this step, I don't understand how to open the Virtual Machine rac2 so that can configure its network (eth0 and eth1).
Can any folk tell me how to open the VM rac2 to configure its network by this step ?
Thanks.

Folks,
Hello. Thanks a lot for replying.
The public IP for eth0 and private IP for eth1 in the file "/etc/hosts" are as follows:
rac1 eth0 192.168.138.35 eth1 192.168.137.35
rac2 eth0 192.168.138.36 eth1 192.168.137.36
In rac1, I have added 2 entries in /etc/hosts as following:
#VIP for eth0
192.168.138.130 rac1-vip.localdomain rac1-genetic-vip
192.168.138.131 rac2-vip.localdomain rac2-cellar-vip
Then I execute the command: [root@rac1 /]# ping rac2
Output:
PING rac2.localdomain (192.168.138.36) 56(84) bytes of data
From rac1.localdomain (192.168.138.35) icmp_seq=1
Destination Host Unreachable
In rac2, I try to add the above 2 entries in /etc/hosts. But cannot save it. The following error message comes up:
"E45: readonly option is set (add ! to override)".
My questions are:
First, do I need to add VIP in the file "/etc/hosts" for both rac1 and rac2 ?
Second, why rac1 still cannot reach rac2 after add VIP in /etc/hosts for rac1 ?
Third, why the file "/etc/hosts" in rac2 is read-only ? How to change it to be editable ?
Thanks.

Oracle 11gr2 RAC hardware

Hello experts,
how to install oracle 11gR2 RAC on Laptop.what are the basic requirements.
RAM 6GB
i7 processer, 500GB Hard Disk
Thanks in Advance.

Hi,
Also two more articles on the same portal with regards to 11gR2 RAC installations
[]http://www.oracle-base.com/articles/11g/oracle-db-11gr2-rac-installation-on-linux-using-nfs.php[]
[]http://www.oracle-base.com/articles/11g/oracle-db-11gr2-rac-installation-on-windows-2008-using-virtualbox.php[]
Regards,

Oracle 11gR2 RAC: Running the script root.sh problem

Folks,
Hello. I am installing Oracle 11gR2 RAC using 2 Virtual Machines (rac1 and rac2 whose OS are Oracle Linux 5.6) in VMPlayer and according to the tutorial
http://appsdbaworkshop.blogspot.com/2011/10/11gr2-rac-on-linux-56-using-vmware.html
I have been installing Grid Infrastructure using runInstaller from step 1 to step 9 of 10 in both VM rac1 and rac2.
Now, I am running the script root.sh in VM rac1 and rac2 as below:
[root@rac1 /]# /u01/app/grid/root.sh
Output:
CRS-4123: ohasd is starting
FATAL: Module oracleoks not found
FATAL: Module oracleadvm not found
FATAL: Module oracleacfs not found
ACFS-9121: Failed to detect /dev/asm/.asm_ctl_spec
ACFS-9310: ADVM/ACFS installation failed.
ACFS-9311: not all components were detected after installation
'UpdateNodeList' was successful.
[root@rac1 /]#
[root@rac2 /]# /u01/app/grid/root.sh
Output:
CRS-4123: ohasd is starting
FATAL: Module oracleoks not found
FATAL: Module oracleadvm not found
FATAL: Module oracleacfs not found
ACFS-9121: Failed to detect /dev/asm/.asm_ctl_spec
ACFS-9310: ADVM/ACFS installation failed.
ACFS-9311: not all components were detected after installation
Start of resource "ora.asm_init" failed.
Failed to start ASM.
Failed to start Oracle Clusterware Stack.
[root@rac2 /]#
As we see the output above, rac1 and rac2 get the same problems. in addition, rac2 fails to start ASM and Clusterware stack. Thus, I have 2 questions:
First, the common problem for rac1 and rac2 :
1)Module "oracleoks, oracleadvm, oracleacfs" not found
2)/dev/asm/.asm_ctl_spec not detected
3)ADVM/ACFS installation failed
Do the above 3 factors affect Grid and DataBase Installation later ? If yes, how to solve these problems ?
Second, how to start ASM and Clusterware stack in rac2 ?
Thanks.

you have 2 options:
1. OEL 5.6 comes with 2 kernels, the original Red Hat, and Oracle UEK, you can choose not to use UEK
or the one i would recommend:
2. Upgrade Grid Infrastructure,
*11.2.0.3.1* (patch 13348650, released about a 1 month ago) supports ACFS on UEK (starting with 2.6.32.200 IIRC)

Oracle 11gR2 RAC : How to resume runInstaller to continue to install Grid ?

Folks,
Hello.
I am installing Oracle 11gR2 RAC using 2 Virtual Machines (rac1 and rac2 whose OS are Oracle Linux 5.6) in VMPlayer.
I have been installing Grid Infrastructure using runInstaller from step 1 to step 9 of 10 in both VM rac1 and rac2.
After finish running the script root.sh in VM rac1 and rac2, the Computer is shut down automaticall because I don't touch the keyboad for a long time. When I resume the Computer, runInstaller Wizard is gone. My question is:
How to resume runInstaller to continue to install Grid ?
Thanks.

Hi!
You can't resume runInstaller.
You must Clear you envinronment, and try again.

Oracle 11gR2 RAC Root.sh Failed On The Second Node

Hello,
When i installing Oracle 11gR2 RAC on AIX 7.1 , root.sh succeeds on first node but fails on the second node:
I get error "Root.sh Failed On The Second Node With Error ORA-15018 ORA-15031 ORA-15025 ORA-27041 [ID 1459711.1]" within Oracle installation.
Applies to:
Oracle Server - 11gR2 RAC
EMC VNX 500
IBM AIX on POWER Systems (64-bit)
in /dev/rhdiskpower0 does not show in kfod output on second node. It is an EMC multipath disk device.
But the disk can be found with AIX command.
any help!!
Thanks

the soluation that uninstall "EMC solutitons enabler" but in the machine i just find "EMC migration enabler" and conn't remove without remove EMC Powerpath.

Oracle 11gR2 RAC: how to solve "user profile creation mask failed" ?

Folks,
Hello.
I am installing Oracle 11gR2 RAC using 2 Virtual Machines (rac1 and rac2 whose OS are Oracle Linux 5.6) in VMPlayer.
I am using Cluster Verification Utility (CVU) to test the 2 nodes for Grid installation as follows:
[ora11g@rac1 grid] $ ./runcluvfy.sh stage -pre crsinst -n all -r 11gR2 -orainv ora11g -fixup -fixupdir /mydir -verbose
All items for rac2 are passed. There is only one item for rac1 is not passed as follows:
Check default user profile creation mask:
Node Name: rac1
Available: 0002
Required: 0022
Comment: failed
There are 3 ways to solve this issue:
1) In the file /etc/bashrc, change the line "umask 0002" to "umask 0022".
2) In the file /etc/profile, add line "umask 0022" at the end of the file.
3) In the file /etc/csh.cshrc, change the line "umask 002" to "umask 0022".
In rac2, I got the same issue in the past. I just change the line "umask 0002" to "umask 0022" in the file /etc/bashrc and the issue is solved.
But in rac1, I have tried each of the 3 options and also combined 1) and 2), 1) and 3), 2) and 3), 1) and 2) and 3). Totally, that's 7 options. But all of 7 options cannot solve the issue.
The script runcluvfy.sh still tests rac1 user profile creation mask failed. My question is:
Do any folk understand how to solve VM rac1 user profile creation mask problem ?
Thanks.

Folks,
Hello. I follow the document "Oracle Grid Infrastructure Installation Guide 11g Release 2 (11.2) for Linux E22489-04" and do the following:
[root@rac1 /]#echo $SHELL
Output: /bin/bash
This means we need to edit Bash shell file .bash_profile.
[ora11g@rac1 ~]$vi /home/ora11g/.bash_profile
Add this line: umask 022
Then I save the file .bash_profile and reboot OS.
Then I run the following command:
[ora11g@rac1 grid] $ ./runcluvfy.sh stage -pre crsinst -n all -r 11gR2 -orainv ora11g -fixup -fixupdir /mydir -verbose
But the reusult is the same. The issue is not solved as follows:
Check default user profile creation mask:
Node Name: rac1
Available: 0002
Required: 0022
Comment: failed
Do any folk understand how to solve VM rac1 user profile creation mask problem ?
Thanks.

The best option to create a shared storage for Oracle 11gR2 RAC in OEL 5?

Hello,
Could you please tell me the best option to create a shared storage for Oracle 11gR2 RAC in Oracel Enterprise Linux 5? in production environment? And could you help to create shared storage? Because there is no additional step in Oracle installation guide. There are steps for only asm disk creation.
Thank you.

Here are names of partitions and permissions. Partitions which have 146 GB, 438 GB, 438 GB of capacity are my storage. Two of three disks which are 438 GB were configured as RAID 5 and remaining disk was configured as RAID 0. My storage is Dell MD 3000i and connected to nodes through ethernet.
Node 1
[root@rac1 home]# ll /dev/sd*
brw-r----- 1 root disk 8, 0 Aug 8 17:39 /dev/sda
brw-r----- 1 root disk 8, 1 Aug 8 17:40 /dev/sda1
brw-r----- 1 root disk 8, 16 Aug 8 17:39 /dev/sdb
brw-r----- 1 root disk 8, 17 Aug 8 17:39 /dev/sdb1
brw-r----- 1 root disk 8, 32 Aug 8 17:40 /dev/sdc
brw-r----- 1 root disk 8, 48 Aug 8 17:41 /dev/sdd
brw-r----- 1 root disk 8, 64 Aug 8 18:26 /dev/sde
brw-r----- 1 root disk 8, 65 Aug 8 18:43 /dev/sde1
brw-r----- 1 root disk 8, 80 Aug 8 18:34 /dev/sdf
brw-r----- 1 root disk 8, 81 Aug 8 18:43 /dev/sdf1
brw-r----- 1 root disk 8, 96 Aug 8 18:34 /dev/sdg
brw-r----- 1 root disk 8, 97 Aug 8 18:43 /dev/sdg1
[root@rac1 home]# fdisk -l
Disk /dev/sda: 72.7 GB, 72746008576 bytes
255 heads, 63 sectors/track, 8844 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 8844 71039398+ 83 Linux
Disk /dev/sdb: 72.7 GB, 72746008576 bytes
255 heads, 63 sectors/track, 8844 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 4079 32764536 82 Linux swap / Solaris
Disk /dev/sdd: 20 MB, 20971520 bytes
1 heads, 40 sectors/track, 1024 cylinders
Units = cylinders of 40 * 512 = 20480 bytes
Device Boot Start End Blocks Id System
Disk /dev/sde: 146.2 GB, 146278449152 bytes
255 heads, 63 sectors/track, 17784 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sde1 1 17784 142849948+ 83 Linux
Disk /dev/sdf: 438.8 GB, 438835347456 bytes
255 heads, 63 sectors/track, 53352 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdf1 1 53352 428549908+ 83 Linux
Disk /dev/sdg: 438.8 GB, 438835347456 bytes
255 heads, 63 sectors/track, 53352 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdg1 1 53352 428549908+ 83 Linux
Node 2
[root@rac2 ~]# ll /dev/sd*
brw-r----- 1 root disk 8, 0 Aug 8 17:50 /dev/sda
brw-r----- 1 root disk 8, 1 Aug 8 17:51 /dev/sda1
brw-r----- 1 root disk 8, 2 Aug 8 17:50 /dev/sda2
brw-r----- 1 root disk 8, 16 Aug 8 17:51 /dev/sdb
brw-r----- 1 root disk 8, 32 Aug 8 17:52 /dev/sdc
brw-r----- 1 root disk 8, 33 Aug 8 18:54 /dev/sdc1
brw-r----- 1 root disk 8, 48 Aug 8 17:52 /dev/sdd
brw-r----- 1 root disk 8, 64 Aug 8 17:52 /dev/sde
brw-r----- 1 root disk 8, 65 Aug 8 18:54 /dev/sde1
brw-r----- 1 root disk 8, 80 Aug 8 17:52 /dev/sdf
brw-r----- 1 root disk 8, 81 Aug 8 18:54 /dev/sdf1
[root@rac2 ~]# fdisk -l
Disk /dev/sda: 145.4 GB, 145492017152 bytes
255 heads, 63 sectors/track, 17688 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 8796 70653838+ 83 Linux
/dev/sda2 8797 12875 32764567+ 82 Linux swap / Solaris
Disk /dev/sdc: 146.2 GB, 146278449152 bytes
255 heads, 63 sectors/track, 17784 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 17784 142849948+ 83 Linux
Disk /dev/sdd: 20 MB, 20971520 bytes
1 heads, 40 sectors/track, 1024 cylinders
Units = cylinders of 40 * 512 = 20480 bytes
Device Boot Start End Blocks Id System
Disk /dev/sde: 438.8 GB, 438835347456 bytes
255 heads, 63 sectors/track, 53352 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sde1 1 53352 428549908+ 83 Linux
Disk /dev/sdf: 438.8 GB, 438835347456 bytes
255 heads, 63 sectors/track, 53352 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdf1 1 53352 428549908+ 83 Linux
[root@rac2 ~]#
Thank you.
Edited by: user12144220 on Aug 10, 2011 1:10 AM
Edited by: user12144220 on Aug 10, 2011 1:11 AM
Edited by: user12144220 on Aug 10, 2011 1:13 AM

Installing Oracle 11gR2 RAC Problem: ASM disks

Folks,
Hello. I am installing Oracle 11gR2 RAC using 2 Virtual Machines (rac1 and rac2 whose OS are Oracle Linux 5.6) in VMPlayer and according to the tutorial
http://appsdbaworkshop.blogspot.com/2011/10/11gr2-rac-on-linux-56-using-vmware.html
At the first time, I create VM rac1. While its OS Oracle Linux 5.6 is booting, initializing ASMLib Driver OK. I create 5 ASM disks successfully using the command:
[root@rac1 /]# /etc/init.d/oracleasm createdisk ASMDISK1 /dev/sdb1
Output: Marking disk "ASMDISK1" as an ASM disk: OK
Because the hard disk space of rac1 is not enough to install Database, I create VM rac1 again with bigger hard disk space (30GB). I do everything the same with that at the first time. But this time, While OS Oracle Linux 5.6 is booting, initializing ASMLib Driver failed. I create 5 ASM disks using the same command:
[root@rac1 /]# /etc/init.d/oracleasm createdisk ASMDISK1 /dev/sdb1
Output: Marking disk "ASMDISK1" as an ASM disk: failed
But when I use the command:
[root@rac1 /]# /etc/init.d/oracleasm listdisks
Output: ASMDISK1 ASMDISK2 ASMDISK3 ASMDISK4 ASMDISK5
My questions are:
First, can the 5 disks "ASMDISK1 ASMDISK2 ASMDISK3 ASMDISK4 ASMDISK5" be used correctly in spite of Marking disk "ASMDISK1(2 3 4 5)" as an ASM disk failed ?
Second, how to fix OS Oracle Linux 5.6 so that initializing ASMLib Driver OK while booting ?
Thanks.

Folks,
Hello. The issue is solved by myself. Thanks.

Install Oracle 11gR2 RAC : Cannot remove directory bootstrap under /tmp

Folks,
Hello. I am installing Oracle 11gR2 RAC using 2 Virtual Machines (rac1 and rac2 whose OS are Oracle Linux 5.6) in VMPlayer and according to the tutorial
http://appsdbaworkshop.blogspot.com/2011/10/11gr2-rac-on-linux-56-using-vmware.html
I am installing Grid infrastructure. I am on step 7 of 10 (verify Grid installation enviroment) and get this error:
"Free Space: Rac2: /tmp
Cause: Could not determine mount point for location specified.
Action: Ensure location specified is available.
Expected value: n/a
Actual value: n/a "
In order to fix the above error, I run "cluster verification utility" according to
http://docs.oracle.com/cd/E14072_01/rac.112/e10717/cvu.htm I run the following command:
[ora11g@rac1 \]$ /home_grid/runcluvfy.sh stage -pre crsinst -n rac1,rac2 -verbose
Output:
/bin/rm: cannot remove directory '/tmp/bootstrap': Operation not permitted
./runcluvfy.sh:line 99:/tmp/bootstrap/ouibootstrap.log: permission denied
From the above output, we can see the directory bootstrap under /tmp causes the problem. The solution is to remove the directory bootstrap. I run the 2 commands:
[ora11g@rac1 tmp]$ rmdir bootstrap
Output: Operation not permitted
[ora11g@rac1 tmp]$ rm -rf bootstrap
Output: cannot remove bootstrap: Operation not permitted.
[ora11g@rac2 tmp]$ ls
Output: there is no 'bootstrap' directory.
My questions are:
First, does "cannot remove boostrap in rac1" cause that /tmp in rac2 could not be determine mount point ?
Second, can any folk help to remove the directory bootstrap under /tmp ?
Thanks.

Folks,
Hello. Thanks a lot for replying. I have just run the 2 commands:
[root@rac2 \]# chown -R ora11g:dba /u01
[root@rac2 \]# chmod -R 775 /u01
ora11g is the user who installs the Grid and /u01 is the directory where Grid is installed and dba is the group.
I go back to Grid Installer Step 7 of 10 in rac1 and check again and see as below:
Free Space: Rac2 : /tmp
Cause: Could not determine mount point for location specified.
Action: Ensure location specified is available
Expected Value: n/a
Actual Value: n/a
The problem is not solved after run the above 2 commands in rac2.
In addition, I have run Cluster Verification Utility using the command:
[ora11g@rac1 grid]./runcluvfy.sh stage -pre crsinst -n rac1,rac2 -r 11gR2 -orainv ora11g -verbose
Output: All of items for rac2 are passed. There is only one item for rac1 is failed as below:
Check default user file creation mask:
NodeName: rac1
Available: 0002
Required: 0022
Comment: failed
As we see above, the result of CVU command is not the same with Grid Installer step 7 of 10 (Installation Environment Verification):
CVU command doesn't find /tmp mount point problem for rac2 that Grid Installer does.
Grid Installer step 7 of 10 doesn't find user file creation mask problem for rac1 that CVU command does.
I have tried to find out whether creation mask failed for rac1 causes /tmp problem for rac2. I have changed the line "umask 002" to "umask 0022" for rac1 in each of the 3 files below and run CVU command each time for each file:
rac1:
/etc/bashrc
/etc/profile
/etc/csh.cshrc
But chang the line "umask 002" to "umask 0022" for rac1 in each of the above 3 files does not solve the problem.
My questions are:
First, why is the result of CVU command not the same with that of Grid Installer step 7 of 10 ?
Second, why change the line "umask 002" to "umask 0022" in 3 files can't solve creation mask problem for rac1 ?
Third, how to solve /tmp problem for rac2 and creation mask problem for rac1 ?
Thanks.

Reinstalling Oracle 11gR2 RAC Grid Problem - ASM Disks Group

Folks,
Hello.
I am installing Oracle 11gR2 RAC using 2 Virtual Machines (rac1 and rac2 whose OS are Oracle Linux 5.6) in VMPlayer.
I have been installing Grid Infrastructure using runInstaller in the first VM rac1 from step 1 to step 9 of 10.
On the step 9 of 10 in the Wizard, accidentally, I touch the Mouse, and the Wizard is gone.
The directory for installing Grid in the 2 VMs is the same: /u01
In order to make sure everything is correct, I delete entire directory /u01 in the 2 VMs and install Grid in rac1 again.
I have understood it's not the right way to delete /u01. The right way is to follow the tutorial
http://docs.oracle.com/cd/E11882_01/install.112/e22489/rem_orcl.htm#CBHEFHAC
But I have deleted /u01 and need to fix one by one. I install Grid again and get the error message on step 5 of 9 as follows:
[INS - 30516] Please specify unique disk groups.
[INS-3050] Empty ASM disk group.
Cause - Installer has detected the disk group name provided already exists on the system.
Action - Specify different disk group.
In Wizard, the previous Disk Group name is "DATA" and its Candidate disks (5 ASMDISKs) are gone. I try to use a different name "DATA2", but no ASMDISKs come up under "Candidate disks". For "ALL Disks", all ASMDISKs cannot be selected.
I want to use the same ASM disk group "DATA" and don't want to create a new disk group.
My question is:
How to have the previous ASM disks and its group "DATA" come up under "Candidate Disks" so that can use it again ?
Thanks.

Hi, in case this helps anyone else. I got this INS-30516 error too was stumped for little while. I have 2 x 2-node RAC which are hitting same SAN. The first-built RAC has a DATA diskgroup. When went to build second RAC on new ASM disk new DIskgroup (but same diskgroup name DATA) got INS-30516 about diskgroup name already in use etc. Finally figured out all that was required was to restrict diskstring using button in installer to only retrieve the LUNS for this RAC (this was quick and dirty - all LUNS for both RAC being presented to both RAC). Once diskstring only searched for the LUNS required for this RAC only, e.g.
ORCL:DATA_P* (for DATA_PD and FRA_PD)
the error went away.
I also have DATA_DR and FRA_DR presenting to both RAC. Apparently it scans the header and if it finds a diskgroup name that is already in use based on the diskstring scan it will not allow reuse of the diskgroup name since it has no way of knowing that the other ASM disks are for a different RAC.
HTH

Uninstall of oracle 11gR2 RAC on linux

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