Add LUN into asm in rac (Solaris)

I have a 2 node oracle rac with asm . I have to add new LUN to asm to increase space in asm disk group I have done the following on node1
Ran format
Created the partition on slice4 on the new device file corresponding to the LUN
Created the block and character device file like RAC_ORACLE_data_05 under /dev/dsk/oracle and /dev/rdsk/oracle (where the other device files used by ASM also reside) using the major and minor number of the new LUN
Changed the permissions to oracle:dba
The new LUN is now visible through the ASM on node 1 as RAC_ORACLE_data_05
My question is what steps I need to carry out on node 2 of the cluster
The disk is visible on node 2 as well
The disk is already showing up with the partitions as created through node 1
Do I have to create the device file under /dev/dsk/oracle with the major minor numbers as shown on node 2 for the LUN
TIA
Ravinder

Almost never use Solaris (last Oracle db I managed on Solaris was 10 years ago). And as this is not a Solaris o/s forum space, you should not expect quick answers to your Solaris o/s questions (which has little to do with ASM).
A comment though on what needs to be done at o/s level to satisfy RAC/ASM requirements.
ASM does not care for device names. Device names do not need to be persistent before and after reboots. Device names do not need to be persistent across RAC nodes in a cluster.
ASM simply needs to
a) be able to discover the device
b) be able to open the device
This means that the device name needs to match the ASM disk discovery string (or vice versa) across all RAC nodes/ASM instances. And that the device permissions need to allow access read/write access to ASM.
ASM enumerates devices it can I/O using its discovery string. For each device, ASM opens the device. It then reads the ASM disk label of the disk. If there is a valid label, ASM knows the disk name, status, and failgroup and diskgroup this disk belongs to. If no label, ASM treats it as a candidate disk.
So from an o/s perspective - a cluster LUN/disk needs to be visible on all nodes, in order to use that disk for RAC/grid storage. Actual device name is not important.
So whatever you did on node 1 to make that new LUN available to ASM, you need to do on node 2 and others.
I have 2 bash scripts I feel are essential to managing a RAC. The 1st script enables me to execute a command on all RAC nodes. The 2nd script enables me to copy/distribute a local file to all other RAC nodes.
So using these scripts and dealing with Linux as o/s, I would determine whether the new disk/LUN is seen by all RAC nodes, and whether the permissions are correct for ASM usage.
If not, I will use the 2nd script to distribute the config file(s) needed to configure the other RAC nodes with the same changes (on Linux this typically would be /etc/multipath.conf). And then use the 1st script to enable those changes on all RAC nodes (e.g. by restarting multipathd).

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Add luns in asm instance...

Hi,
I need to configure Oracle ASM to include 5 additional new LUN . The oracle database is already up and running on an Oracle DB. The DB is already configured for 6 LUNs, but we need the DB updated to include the 5 new LUNs.
Already Configured disks:
/dev/rhdisk1 - 100 GB
/dev/rhdisk2 - 100 GB
/dev/rhdisk3 - 100 GB
/dev/rhdisk4 - 100 GB
/dev/rhdisk5 - 100 GB
/dev/rhdisk6 - 30 GB
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/dev/rhdisk7
/dev/rhdisk8
/dev/rhdisk9sy
/dev/rhdisk10
/dev/rhdisk11
Please let me know steps how to do it and what all informance i need to do it..

oradba11 wrote:
I need to configure Oracle ASM to include 5 additional new LUN . Not necessary. ASM either sees these LUNs. Or not. There is no ASM side configuration needed to use/see these additional LUNs or make them visible.
The oracle database is already up and running on an Oracle DB. The DB is already configured for 6 LUNs, but we need the DB updated to include the 5 new LUNs.
Already Configured disks:
/dev/rhdisk1 - 100 GB
..snipped..
New Disks to Configure:
/dev/rhdisk7
..snipped..Which means the ASM disk discovery string should be "+/dev/rdisk*+". And implies that ASM will automatically see these LUNs when made available by the o/s.
No additional steps needed on the ASM side.
On the o/s side, the new devices need to have the proper permissions in order for ASM to see and use these devices. So permissions need to be set in order for ASM to see these new devices. Assuming that is done, ASM will see these new LUNs.. just as it sees the existing LUNs. (ASM does not know the difference until it checks the header of each LUN to determine whether it is a member disk, or a candidate disk).

Adding luns to asm on solaris

Hi Experts,
How to add luns to asm on solaris ? In linux i know with oracleasm command with options like scandisk, adddisk etc.. In solaris those rpms will not be there i guess.
Thanks in advance,
Mahesh.G

Hi,
I got the answer. It's " luxmadm probe " command that gives you the information about attached SAN Luns. You can add these luns to asm diskgroups.
Cheers..
Mahesh.G

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Hi Team,
We are using 10g RAc with ASM file system....here the problem is ..One of our engineer by mistake added a datafile in File System insted of adding into ASM disk groups.. it has created in node1 oracle home location....and the file is currently used by database....
295 +DG8/datafile/pm_tdat1_084.dbf                     10240
296 +DG9/datafile/pm_tdat_001.276.771180789            10240
*297 /oracle/product/10.2.0/db_1/dbs/+DG5 5120*
298 +DG9/datafile/pm_tidx_001.277.771224587             5120
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MM
Edited by: user7439393 on Dec 30, 2011 12:29 AM

The backup into the ASM diskgroup can be done online.
For the switch to copy and the following recover datafile, the datafile needs to be set offline, though.
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I need to add a new node to RAC Oracle 10g R2

I need to add a new node to RAC Oracle 10g R2.
what is the best mode.
cloning or step by step?
SO: Solaris 64bit
Message was edited by:
ACS

Hi All,
I get the following error eventhough I have followed the instruction for Solaris R2. The instruction is enclosed. Please Advise! Thanks.
/app/cluvfy/runcluvfy.sh stage -post hwos -n nod1 -verbose
Result: User equivalence check failed for user "oracle".
ERROR:
User equivalence unavailable on all the nodes.
Verification cannot proceed.
Post-check for hardware and operating system setup was unsuccessful on all the nodes.
=========================
1. Log in as the oracle user.
2. If necessary, create the .sshdirectory in the oracle user’s home directory and
set the correct permissions on it:
$ mkdir ~/.ssh
$ chmod 700 ~/.ssh
3. Enter the following commands to generate an RSA key for version 2 of the SSH
protocol:
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¦ Accept the default location for the key file.
¦ Enter and confirm a pass phrase that is different from the oracle user’s
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This command writes the public key to the ~/.ssh/id_rsa.pub file and the
private key to the ~/.ssh/id_rsafile. Never distribute the private key to anyone.
4. Enter the following commands to generate a DSA key for version 2 of the SSH
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¦ Accept the default location for the key file
Pre-Installation Tasks 2-11
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¦ Enter and confirm a pass phrase that is different from the oracle user’s
password
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1. On the local node, determine if you have an authorized key file
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$ cd ~/.ssh
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authorized_keys
oracle@node1’s password:
[oracle@node1 .ssh]$ ssh node1 cat /home/oracle/.ssh/id_dsa.pub >>
authorized_keys
oracle@node1 .ssh$ ssh node2 cat /home/oracle/.ssh/id_rsa.pub >>
authorized_keys
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[oracle@node1 .ssh$ ssh node2 cat /home/oracle/.ssh/id_dsa.pub
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ADD DATAFILE in ASM

Hello
How can I add a datafile in a RAC database with ASM?
The filename are create by ASM are like this
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ASM wihout RAC

Oracle 10g - Solaris 64 bit SPARC.
What, if any are the advantages of utilizing ASM without RAC in a SAN environemnt?

ASM, RAC and Streams are three seperate components of Oracle Grid Computing that can be integraded at software level using ASM and clusterware softwares.
After Implementing ASM you will see that the data can be striped and balanced on multiple disks. There are no physical file system when you implement ASM the files are all logical and striped on multiple disks of the Disk groups. RMAN utility can only be used to take a back. You cannot take an image copy of your database as there are no physical files.
RAC is usually for high availability, load balancing, scalability of applications i.e. handle more workload, application partitioning using Services. etc.
For more details go though the following links.
http://www.oracle.com/technology/products/database/asm/index.html
AND
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Add LUN into asm in rac (Solaris)

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