Shared disk (SAN EVA 4400) configuration for ASM on linux RHEL5

Hi all,
I want to install RAC database (oracle 10g on RHEL5). Now we are configurind shared storage for the both servers (nodes). In disk configuration (SAN on EVA 4400) we have created the volume group for the disk to use for ASM and present the disk group to the servers. Actually when we check the server we cannot see the disk (shared storage).
[root@cdr-analysis01 ~]# ls /dev/cciss/ -lR
/dev/cciss/:
total 0
brw-r----- 1 root disk 104, 0 Jul 1 2009 c0d0
brw-r----- 1 root disk 104, 1 Jul 1 14:29 c0d0p1
brw-r----- 1 root disk 104, 2 Jul 1 14:29 c0d0p2
brw-r----- 1 root disk 104, 3 Jul 1 14:29 c0d0p3
brw-r----- 1 root disk 104, 4 Jul 1 2009 c0d0p4
brw-r----- 1 root disk 104, 5 Jul 1 14:29 c0d0p5
brw-r----- 1 root disk 104, 6 Jul 1 14:29 c0d0p6
brw-r----- 1 root disk 104, 7 Jul 1 2009 c0d0p7
brw-r----- 1 root disk 104, 8 Jul 1 14:29 c0d0p8
(they are local disks not the shared disk)
My questions are:
- How to mount the disk to be seen in the server
- How to configure the disk for ASM is there any document for this. In my knowledge the disk to use for ASM doesn't need to be formated with a file system and shouldn't see when we run the df command.
Does anybody can help me as it's very urgent for us.
Thank you
Raitsarevo

Hi all,
NOw the disk is presented to server. but my actual problem is how to create shared partition of this disk for the servers.
Our actual status is we have created one volume group with 500 Gb in the sun and this volume group is called vg_oradata. we will use this storage for OCR, voting disk and the databse file (ASM). A si know from documentation i have to create one shared partition for OCR, one shared partition for Voting disk and another for database.
That i want to do is creating for example :
ocr_partition (25 Gb) : for OCR
vote_partition (25 Gb): for Voting disk
oradata_part1 (150 Gb): for database (ASM)
oradata_part2 (150 Gb): for database (ASM)
oradata_part3 (150 Gb): for database (ASM)
My problem is how to create this partition because when i'm trying to create it from Logical Volume Manager of Linux i cannot find them in to servers.
I mean i'm new in system administrator and our SAN vendors also doesn't know how to it in LInux system.
Could you help me please if possible.
My system is Linux Red Hat Enterprise 5 and i'm going to use Oracle 1Og RAC.
Thank you
Lucienot

Similar Messages

Configuration of ASM on Linux 5.3

Please help me to configure the ASM in RHL 5.3 oracle version is 11.2.0.2 .whick rpm packages need to install.

Hi,
Check this manual.
<<http://docs.oracle.com/cd/E11882_01/install.112/e22489/typinstl.htm#CBHJGHHG>>
Regards,

Shared partition creation (SAN EVA 4400) for OCR/Vote andASM on linux RHEL5

Hi all,
We are going to install database (Oracle 10g) with RAC on Linux Red Hat Enterprise 5. The storage we are using is SAN shared storage, out SAN vendor has finished to configure and present the dsk storage (500 Gb) to the 2 servers, the name of the volume group is VG_ORADATA. this volume will be used for OCR, VOting disk and ASM (database file).
Our problem is to create and configure the shared partition for the 2 servers.
Here is what i want to do, i want to create:
ocr_partition (25 Gb) : for OCR
vote_partition (25 Gb): for Voting disk
oradata_part1 (150 Gb): for database (ASM)
oradata_part2 (150 Gb): for database (ASM)
oradata_part3 (150 Gb): for database (ASM)
The problem is how to create these partiton an dto mount them for the 2 servers, what is the tools we have to use for this tasks. Can i use LVM (Logical Volume Manager) in linux for this tasks.
Thanks for the help and need your help as it's very urgent for us.
Thank you
Raitsarevo.

My thoughts.
1. Your OCR partition size is too high by several orders of magnitudes. Read the docs and size it appropriately.
2. Your Voting disk partition size is also far too large. Again read the docs and size it appropriately.
3. If you have RAC you have one and only one database (not 3)
4. ASM is not a database and requires no room on your SAN. ASM is an instance that must reside on your servers (nodes).
5. Where are you putting your flashback recovery area, archived redo logs, flashback logs, etc?
6. Where are you putting your online backup files?
7. If you have ASM throw the LVM away. It will do nothing for you other than eat CPU.

Error while configuring the ASM on linux

i am trying to implement ASM of the virtual machine.. i downloaded the ASM libraries and packages and installed them as a "root" user using the following command:
$>rpm -Uvh oracleasm*
after the installtion was done i went to configure the library driver by executing the following command(also as a root user)
$>/etc/init.d/oracleasm configure...
i answered all the question given by the command and then the following error message occured..
This will configure the on-boot properties of the Oracle ASM library
driver. The following questions will determine whether the driver is
loaded on boot and what permissions it will have. The current values
will be shown in brackets ('[]'). Hitting <ENTER> without typing an
answer will keep that current value. Ctrl-C will abort.
Default user to own the driver interface [oracle]:
Default group to own the driver interface [dba]:
Start Oracle ASM library driver on boot (y/n) [y]:
Fix permissions of Oracle ASM disks on boot (y/n) [y]:
Writing Oracle ASM library driver configuration: [ OK ]
Loading module "oracleasm": Unable to load module "oracleasm"
[FAILED]
i don't have much experience with ASM to solve this problem, so if someone can help then i will appreciate it.
NOTE: my platform is
ORACLE10gR2(10.2.0.1)
RHEL 4 update 5.

i have been trying to delete the ASM library driver and install it again but i get this message everytime i do so..,
[root@localhost RPMS]# rpm -ev oracleasm-2.6.9-55.0.0.0.2.EL-2.0.3-2.i686.rpm
error: package oracleasm-2.6.9-55.0.0.0.2.EL-2.0.3-2.i686.rpm is not installed
then i execute the following command to install it and the following appears.
[root@localhost RPMS]# rpm -ivh oracleasm-2.6.9-55.0.0.0.2.EL-2.0.3-2.i686.rpm
warning: oracleasm-2.6.9-55.0.0.0.2.EL-2.0.3-2.i686.rpm: V3 DSA signature: NOKEY, key ID b38a8516
Preparing... ########################################### [100%]
package oracleasm-2.6.9-55.0.0.0.2.EL-2.0.3-2 is already installed
it is really weired,,,
if someone have encountered this scenario then please explain this issue for me.

Dell Equallogic SAN HIT Kit support for SAP in Linux 11.2

Hello Everyone,
I would like to use an Equallogic SAN as storage in SUSE Linux Enterprise Server 11.2. Is the Equallogic SAN supported in Linux when using the HIT Kit to provide MPIO and snapshot support? The article from thorsten.staerk describes Equallogic SAN + Linux + native iSCSI (no mention of the HIT Kit). I understand that there are restrictions on using third party kernel modules.
My understanding is that the Equallogic MPIO driver will provide a faster, more efficient, connection to the SAN along with additional features.
References:
Playing with an Equallogic storage
http://scn.sap.com/people/thorsten.staerk/blog/2009/02/10/playing-with-an-equallogic-storage
Thorsten describes using Equallogic with SAP on SUSE Linux Enterprise
Thorsten uses native iSCSI drivers
How to configure Multipath using Equallogic Host Integration Toolkit (HIT) on Linux for Oracle
http://en.community.dell.com/techcenter/enterprise-solutions/w/oracle_solutions/3795.how-to-configure-multipath-using-equallogic-host-integration-toolkit-hit-on-linux-for-oracle.aspx
Describes using Equallogic multipath on Linux
Mentions that the Equallogic mpio is a combination of user mode and kernel mode binaries
Dell EqualLogic Host Integration Tools
http://www.dell.com/downloads/global/products/pvaul/en/equallogic-host-software-new.pdf
Host Integration Tools Overview from Dell
Support for CentOS 5.7, Red Hat Enterprise Linux (RHEL) 5.7, 6.1 and 6.2, SUSE Enterprise Linux Server (SLES) 11 SP1
Dell EqualLogic Host Integration Tools for Linux
Installation and User's Guide Version 1.2.0
From the documentation "Installs a compatible prebuilt kernel module, if available. Otherwise, the installation script loads the Dynamic Kernel Module Support (DKMS) package and compiles the Dell EqualLogic-supplied kernel module."
EqualLogic Integration: Installation and Configuration of Host Integration Tools for Linux – HIT/Linux
The Dell EqualLogic HIT/Linux MPIO software consists of two components:
1. The EqualLogic Host Connection Manager daemon, ehcmd, which monitors the iSCSI session state and the configuration of the Linux server and PS Series group. Running in the background, the ehcmd daemon uses the Open-iSCSI management tool (iscsiadm) to add, remove, or modify iSCSI sessions to maintain an optimal number of iSCSI sessions. It also gathers information on the volume layout from the PS Series group.
2. A loadable kernel module, dm-switch, which implements a new Device Mapper target to the multipath devices. Based on the volume layout on the array members, the dm-switch module routes each I/O to the optimal path within the PS Series group.
SAP Note 784391 - SAP support terms and 3rd-party Linux
kernel drivers
The use of binary-only Linux kernel modules or drivers on the same server as SAP software is not recommended by SAP.
Thank You,
Kevin

I'll take a moment to provide an update on the solution. There were some issues with the initial configuration of the in guest iSCSI volumes. If I had to start from scratch, I would run all the storage through VMware. The last round of software updates appears to have resolved a potentially serious issue with iSCSI disconnects. iSCSI has run perfectly for two months now. I'll consider the issue resolved once I have six months without any iSCSI issues.
One remaining issue is that LVM won't initialize properly without implementing a custom init script. The init script work-around is simple and it works.
Configuration Overview:
VMware ESXi v5.5
Equallogic SAN (with v.7.0.3 firmware)
SUSE SLES v11.3
Equallogic HIT Kit for Linux v1.3

Shared Disks For RAC

Hi,
I plan to use shared disks to create Oracle RAC using ASM. What options do I have? OCFS2? or any other option?
Can some one lead me to a documnet on how can I use the shared disks for RAC?
Thanks.

javed555 wrote:
I plan to use shared disks to create Oracle RAC using ASM. What options do I have? You have two options:
1. Create shared virtual, i.e. file-backed disks. These files will be stored in /OVS/sharedDisk/ and made available to each guest
2. Expose physical devices directly to each guest, e.g. an LVM partition or a multipath LUN.
With both options, the disks show up as devices in the guests and you would then provision them with ASM, exactly the same way as if your RAC nodes were physical.
OCFS2 or NFS are required to create shared storage for Oracle VM Servers. This is to ensure the /OVS mount point is shared between multiple Oracle VM Servers.

2 TB Disk For Asm (Sugesstions Please)

Hello,
I have setup a rac install on 11g Aix 6.1 and i have a 2TB disk that will be used for ASM. When i reach the configuration page of ASM to setup disks i see that the raw drive which is supposed to show a 2TB raw drive is showing the size as 4095 TB which is a big mismatch.
We had cleared the headers of the disk with this command "dd if=/dev/zero of=/dev/rhdisk7 bs=1k count=256" and i'm not sure if this caused the problem.
Any suggestions here. I am on 11.1.0.6 or is this a bug.
I was thinking of breaking this disk into 500G each into 4 drives equalling to 2TB.
Can someone please help here.

SQL> create diskgroup 'DWHDATAVOL1' external redundancy disk '/dev/raw/raw3','/dev/raw/raw4';
create diskgroup 'DWHDATAVOL1' external redundancy disk
'/dev/raw/raw3','/dev/raw/raw4'
FEHLER in Zeile 1:
ORA-15018: Plattengruppe kann nicht erstellt werden
ORA-15099: disk '/dev/raw/raw4' is larger than maximum size of 2097152 MBs
ORA-15099: disk '/dev/raw/raw3' is larger than maximum size of 2097152 MBshttp://jonathanlewis.wordpress.com/2009/08/14/tera-bug/
metalink : bug 7243305, 6453944
fixed on 11.2
- use 500G into 4 drives to 2TB.
- use 11gR2

Using MS FileSharingTestSuite for TESTING a LINUX Based SMB/CIFS implementation.

Hi,
I was trying to setup the MS File Sharing test suite for testing the below implementation.
Could please let me know if this use-case is supported. If not could please point me to
resources [Microsoft] which could help achieve this purpose effectively.
I want to test CIFS File server implementation running on Linux [SUSE Linux - Open Enterprise Server]
The client accessing the file services from above
CIFS server implementation is vastly
Windows clients.
Though would like to know ways of testing if the client is a Linux based desktop or a Mac based client as well in future.
For the above setup details I would like to know if and how we could create a "Driver
Computer" setup mainly. So we could use the File Sharing test suite to test against this Linux based CIFS server implementation.
And also the details on setting up the 'System Under Test (SUT)' , if any changes required[from what is documented in the "FileSharing_ServerUserGuide]" to
achieve the above.
Could kindly point me in the right direction to help achieve the above testing purpose.
Please let me know in case any details are required to help resolve the query.
Thanks for your time and help.
Regards,
Kavitha A

Hi,
Thanks for your time.
I am actually talking about using file sharing test suite provided My microsoft for testing a Linux Based CIFS/SMB implementation.
I have got my query answered via Mail from Microsoft dochelp team. hence marking this as resolved.
Posting the response /resolution from DOcHelp team on this thread for benefit of anyone looking for similar information/understanding:
If you are testing in a Workgroup scenario you need a Driver Computer and the System Under Test (SUT) computer.
In a domain-joined scenario, you need a DC somewhere in your environment to join the machines.
The guide document that comes with the test suite package provides guidance on what needs to be configured in each scenario.
The Driver Computer is the Windows machine where the synthetic test suite runs and simulates a client by emitting the protocol packets. The client sends packets to the file server
(the SUT) to test the server implementation of the protocol.
The SUT implements the server side of the protocol and the SUT can be running on any operating system.
For your convenience, you can setup a Windows SUT just for the purpose of understanding the test configuration on the driver client.
The document has instructions for Windows SUT and guidelines for non-Windows SUT as well. In your case, it’s a non-Windows SUT. You need to configure your server where your file
server implementation is running and setup the Driver computer to test your SUT.
I understand that your ultimate goal is to setup your own SUT on the SUSE Linux server.
Many customers have setup SUTs on CentOS, Ubuntu, etc. The flavor of the operating system is not relevant as such. The client simulator talks the SUT by following the protocol
packets.
Please go through the document step-by-step and I am sure it will come together.
Let’s me know whether you have any further questions.
I am not looking at CIFS share access from a Linux system. Otherwise would have posted in relevant Linux forums If looking for the same information. Thanks again for taking time to help though.

Creating DAS or SAN Disk Partitions for ASM

Oracle® Database Installation Guide 11g Release 2 (11.2) for Linux (http://docs.oracle.com/cd/E11882_01/install.112/e24321/oraclerestart.htm#CHDBJGEB)
*3.6.3 Step 2:* Creating DAS or SAN Disk Partitions for Oracle Automatic Storage Management
In order to use a DAS or SAN disk in Oracle ASM, the disk must have a partition table. Oracle recommends creating exactly one partition for each disk.
My question: why does Oracle recommend creating exactly one partition for each disk? For a disk to be used on Suse Linux, I normally need to at the least 3 partitions, i.e., boot, swap, and root.
Scott

Please read the entire manual - before starting setup and configuration.
From the very same manual:
Do not specify multiple partitions on a single physical disk as a disk group device.
Oracle ASM expects each disk group device to be on a separate physical disk.So why use partitioning? If you need to subdivide a LUN into smaller LUNs and use these instead of the larger LUN. Reasons could range from LUNs bigger than 2TB in size (ASM only support up to 2TB size LUNs), to wanting partition 1's of x size for ASM diskgroup 1 and partition 2's of y size for ASM diskgroup 2.
If you do partition, take the extra precaution of marking the partition as a non-file system (partition type <i>da</i>) to safeguard against someone (like a sysadmin looking for space) from mounting it as a file system.
Generally though - I would not partition LUNs for ASM use.

Configuring Filesystem Free Disks for ASM ? Can you use free space for ASM

Is there a way to dedicate the available disk space for ASM in order to create a database under ASM?
I was hoping that I would not have to reinstall the Linux OS Enterprise 5 (Red Hat). So I de-installed my 2-node RAC environment, installed the ASM required RPMs for Red Hat linux Enterperise 5 and then proceeded to reinstall 11g Clusterware and set "Configure Automatic Storage Management (ASM)".
Did I miss something? THanks

Thank you.
I have 3 VM-Oracle guests running Oracle 11g. When I've used NFS as share that worked fine, however I was not using ASM. I know wish to get smart about ASM implementation.
Server1(rac1) Linux E5 64bit
Server2(rac2) Linux E5 64bit
Server3(asm) Linux E5 64bit (I created four partitions
./oracleasm createdisk DATDISK /dev/xvda10 OK
./oracleasm createdisk VOTDISK /dev/xvda11 OK
./oracleasm createdisk OCRDISK /dev/xvda12 OK
./oracleasm createdisk OFRDISK /dev/xvda13 OK
On Node1 and Node 2
./oracleasm scandisk
Scanning the system for Oracle ASMLib disks: OK
After this should I or how do you make a partition shared? Could I used NFS? so that I can proceed with the RAC install and then create database .

How to determine raw disks configured for OCR/voting disk, ASM spfile

I have a two-node Oracle 10gR2 RAC configuration using raw disks. Basically, raw disks are used for CRS's OCR/voting disks, ASM's ASM spfile and disk groups.
Is there a better way to figure out what raw disks are configured in Oracle using methods other than those shown below:
- To find out votedisk:
# crsctl query css votedisk
0. 0 /dev/ora_crs_vote1
1. 0 /dev/ora_crs_vote2
2. 0 /dev/ora_crs_vote3
- To find out OCR:
# ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 525836
Used space (kbytes) : 3856
Available space (kbytes) : 521980
ID : 1603037329
Device/File Name : /dev/ora_ocr_file1
Device/File integrity check succeeded
Device/File Name : /dev/ora_ocr_file2
Device/File integrity check succeeded
Cluster registry integrity check succeeded
- Is there a way to figure out what disk device is used for ASM spfile?
- To find out raw disks configured for disk groups:
while connected to the ASM instance in sqlplus:
SQL> select name,path from v$asm_disk where name like 'DG%';
NAME
PATH
DG_DC_ASM_0000
/dev/rhdiskpower13
DG_DC_ASM_0001
/dev/rhdiskpower14
DG_DC_ASM_0002
/dev/rhdiskpower15
NAME
PATH
DG_DC_ASM_0003
/dev/rhdiskpower22

http://docs.oracle.com/cd/B19306_01/install.102/b14203/storage.htm#BABFFBBA
and
Configuring raw devices (singlepath) for Oracle Clusterware 10g Release 2 (10.2.0) on RHEL5/OEL5 [ID 465001.1]
Configuring raw devices (multipath) for Oracle Clusterware 10g Release 2 (10.2.0) on RHEL5/OEL5 [ID 564580.1]

Would like to know if this is correct disk configuration for 11.2.0.3

Hello, please see the procedure below that I used to allow the grid infratstructure 11.2.0.3 oui to be able
to recognize mY EMC San disks as candidate disks for use with ASM.
we are using EMC powerpath for our multipathing as stated in the original problem description.I want to know if this is a fully supported method for
configuring our san disks for use with oracle ASM becuase this is redhat 6 and we do not have the option to use the asmlib driver.Please note that I have
been able to successfully install the gird infrastructure successfully for a 2 node RAC cluster at this point using this method.Please let me know if there
any issue with configuring disks using this method.
We have the following EMC devices which have been created in the /dev directory.I will be using device emcpowerd1 as my disk for the ASM diskgroup I will be
creating for the ocr and voting device during grid install.
[root@qlndlnxraccl01 grid]# cd /dev
[root@qlndlnxraccl01 dev]# ls -l emc*
crw-r--r--. 1 root root 10, 56 Aug 1 18:18 emcpower
brw-rw----. 1 root disk 120, 0 Aug 1 19:48 emcpowera
brw-rw----. 1 root disk 120, 1 Aug 1 18:18 emcpowera1
brw-rw----. 1 root disk 120, 16 Aug 1 19:48 emcpowerb
brw-rw----. 1 root disk 120, 17 Aug 1 18:18 emcpowerb1
brw-rw----. 1 root disk 120, 32 Aug 1 19:48 emcpowerc
brw-rw----. 1 root disk 120, 33 Aug 1 18:18 emcpowerc1
brw-rw----. 1 root disk 120, 48 Aug 1 19:48 emcpowerd
brw-rw----. 1 root disk 120, 49 Aug 1 18:54 emcpowerd1
brw-rw----. 1 root disk 120, 64 Aug 1 19:48 emcpowere
brw-rw----. 1 root disk 120, 65 Aug 1 18:18 emcpowere1
brw-rw----. 1 root disk 120, 80 Aug 1 19:48 emcpowerf
brw-rw----. 1 root disk 120, 81 Aug 1 18:18 emcpowerf1
brw-rw----. 1 root disk 120, 96 Aug 1 19:48 emcpowerg
brw-rw----. 1 root disk 120, 97 Aug 1 18:18 emcpowerg1
brw-rw----. 1 root disk 120, 112 Aug 1 19:48 emcpowerh
brw-rw----. 1 root disk 120, 113 Aug 1 18:18 emcpowerh1
As you can see the permissions by default are root:disk and this will be set at boot time.These permissions do not allow the Grid Infrastructure to recognize
the devices as candidates for use with ASM so I have to add udev rules to assign new names and permissions during boot time.
Step 1. Use the scsi_id command to get the unique scsi id for the device as follows.
[root@qlndlnxraccl01 dev]# scsi_id whitelisted replace-whitespace --device=/dev/emcpowerd1
360000970000192604642533030434143
Step 2. Create the file /etc/udev/rules.d/99-oracle-asmdevices.rules
Step 3. With the scsi_id that was obtained for the device in step 1 you need to create a new rule for that device in the /etc/udev/rules.d/99-oracle-
asmdevices.rules file. Here is what the rule for that one device looks like.
KERNEL=="sd*1" SUBSYSTEM=="block",PROGRAM="/sbin/scsi_id --whitelisted --replace-whitespace /dev/$name",RESULT=="360000970000192604642533030434143",NAME="asm
crsd1",OWNER="grid",GROUP="asmadmin",MODE="0660"
( you will need to create a new rule for each device that you plan to use as a candidate disk for use with oracle ASM).
Step 4. Reboot the host for the new udev rule to take affect and then verify that the new device entry will be added into the /dev directory with the
specified name, ownership and permissions that are required for use with ASM once the host is back online.
Note: You will need to replicate/copy the /etc/udev/rules.d/99-oracle-asmdevices.rules file to all nodes in the cluster and restart them for the changes to
be in place so that all nodes can see the new udev device name in the /dev directory on each respective node.
You should now see the following device on the host.
[root@qlndlnxraccl01 rules.d]# cd /dev
[root@qlndlnxraccl01 dev]# ls -l asm*
brw-rw----. 1 grid asmadmin 65, 241 Aug 2 10:10 asmcrsd1
Step 5. Now when you are running the oui installer for the grid installation when you get to the step where you define your ASM diskgroup you should choose
external redundancy and then click on the change disk dicovery path and change the disk discovery path as follows.
/dev/asm*
Now at this point you will see the new disk name asmcrsd1 showing as a condidate disk for use wiith ASM.
PLease let us know if this is a supported method for our shared disk configuration.
Thank you.

Hi,
I've seen this solution in a lot of forums but I do not agree or don't like at all; even if we have 100 luns of 73GB each.
so the thing is, as in any other unix flavor we don't have asmlib***just EMCPOWERPATH running on differentes unix/linux flavors we dont like either udev-rules, dm-path and stuff***
Try this as root user
ls -ltr emcpowerad1
brw-r----- 1 root disk 120, 465 Jul 27 11:26 emcpowerad1
# mknod /dev/asmdisks
# chown oragrid:asmadmin /dev/asmdisks
# cd /dev/asmdisks
# mknod VOL1 c 120 465
# chmod 660 /dev/asmdisks/VOL*
repeat above steps on second node
asm_diskstring='/dev/asmdisks/*'
talk with sysadmin and stoadm guys to garanty naming and persistents in all nodes of your RAC using emcpowerpath. (even after reboot or san migration)

RAC with ASM and shared disks?

Hi all,
Can someone clarify this little point please. If I use ASM as my storage with a RAC database, I have to configure these nodes to shared disks. At least this is what the UG says ...
When you create a disk group for a cluster or add new disks to an existing clustered disk group, you only need to prepare the underlying physical storage on shared disks. The shared disk requirement is the only substantial difference between using ASM in a RAC database compared to using it in a single-instance Oracle database. ASM automatically re-balances the storage load after you add or delete a disk or disk group.
With my 9i databases, I used HCAMP to allow for concurrent VG access among the nodes. My questions are ...
1) How can I share this storage as stated above without using HACMP? My understanding is with 10g I no longer have to use it.
2) Can Oracle's clusterware be used to share storage? I have not seen any indication that it does.
3) Does this mean I still have to use HCAMP with 10g crs to allow shared storage?
Thank you

"...meaning visible to all the participating nodes, which you don't need HACMP..."
This is one step forward, but still not clear. On unix, storage is presented to ASM as raw volumes. As such, how can these volumes be visible on all nodes without using HCAMP (or whatever 3rd party clusterware you are using). Presenting raw volumes on several nodes is something that is not done at OS level without using some clusterware functionality.
I do understand that storage or LUNs can be shared at the SAN fabric level. But then, these LUNs are carved in bug chunks and I would like to be able to allocate storage at much granular level using raw partitions.
So all in all, here are my questions ...
1) On unix platforms, can ASM disks be LUNs, raw volumes, or may be both?
2) If raw volumes, how are these shared (or made visible) without using 3rd party clusterware? Having managed 9i RAC, it was the function of HACMP to make these volumes visible on all nodes, otherwise, we had to imp/exp VGs on all nodes to make them visible.
Thank you

No shared disks visible in the Cluster Configuration Storage dialog

When installing the Oracle 10g clusterware the "Cluster Configuration Storage" dialog shows no shared disks.
We are using:
Windows 2003 Server
HP Eva 4400

Hello,
all disks in cluster are visible from all nodes (2 of them).
We tested it with unpartioned and partioned disks (primary and extended). No way to make them visible for the OUI.
Automount is enabled in Windows like required from Oracle.
Besides, we are using Standard Edition. Therefore we have to work with ASM.
Any more information needed.
Thanx in advance.

Using udev devices for ASM disk on Linux

Hello all,
I need details related to using udev devices as ASM disk on Linux.
What I want to know is, once i get the list of ASM Disks that are used to create the DiskGroups, based on the path of the Disk (whether /dev/sdj or /dev/dm-3 or /dev/asm_udev_device, /dev/vx/<vxvm-volume>, /dev/<lvm-volume>) how do i get to know if the device type is a udev device?
I want to know an automated process, so that i can script it out to separate out each device easily.
Please let me know if anyone has expertise on using udev devices with Oracle ASM.
I have referred the link but no much details available http://www.oracle.com/technology/products/database/asm/pdf/device-mapper-udev-crs-asm%20rh4.pdf
Further, the behavior of udevinfo command is very different across version of Linux. From Suse 10 onwards, udevadm has to be used instead.
Its confusing to me.
Please help.
~Sumeet.

My installation, ASM On SI
S.O HP-UIx
Disk internal, not SAN
Internal disk configuration for Oracle.
PV Name /dev/dsk/c11t0d0
PV Name /dev/dsk/c11t1d0
PV Name /dev/dsk/c11t2d0
PV Name /dev/dsk/c11t3d0
PV Name /dev/dsk/c11t4d0
PV Name /dev/dsk/c11t6d0
Vg:
/dev/vgora
Lv
/dev/vgora/lvu01 <-- Oracle Bin mounted /u00
/dev/vgora/lvu02 <-- External Archive /u02
In /dev/vgora
brw-r----- 1 root sys 64 0x010001 Mar 8 14:42 lvu01
brw-r----- 1 root sys 64 0x010002 Mar 8 16:15 lvu02
brwxrwxr-x 1 root sys 64 0x010003 Mar 19 14:19 lvasm01
brwxrwxr-x 1 root sys 64 0x010004 Mar 19 14:20 lvasm02
brwxrwxr-x 1 root sys 64 0x010005 Mar 19 14:20 lvasm03
brwxrwxr-x 1 root sys 64 0x010006 Mar 19 14:20 lvasm04
brwxrwxr-x 1 root sys 64 0x010007 Mar 19 14:20 lvasm05
brwxrwxr-x 1 root sys 64 0x010008 Mar 19 14:20 lvasm06
brwxrwxr-x 1 root sys 64 0x010009 Mar 19 14:20 lvasm07
brwxrwxr-x 1 root sys 64 0x01000a Mar 19 14:20 lvasm08
brwxrwxr-x 1 root sys 64 0x01000b Mar 19 14:20 lvasm09
brwxrwxr-x 1 root sys 64 0x01000c Mar 19 14:21 lvasm10
crw-r----- 1 root sys 64 0x010001 Mar 8 14:42 rlvu01
crw-r----- 1 root sys 64 0x010002 Mar 8 16:15 rlvu02
crw-r--r-- 1 root sys 64 0x010000 Mar 8 14:19 group
FOR ASM
crw-rw---- 1 oracle dba 64 0x010003 Mar 19 14:19 rlvasm01
crw-rw---- 1 oracle dba 64 0x010004 Mar 19 14:20 rlvasm02
crw-rw---- 1 oracle dba 64 0x010005 Mar 19 14:20 rlvasm03
crw-rw---- 1 oracle dba 64 0x010006 Mar 19 14:20 rlvasm04
crw-rw---- 1 oracle dba 64 0x010007 Mar 19 14:20 rlvasm05
crw-rw---- 1 oracle dba 64 0x010008 Mar 19 14:20 rlvasm06
crw-rw---- 1 oracle dba 64 0x010009 Mar 19 14:20 rlvasm07
crw-rw---- 1 oracle dba 64 0x01000a Mar 19 14:20 rlvasm08
crw-rw---- 1 oracle dba 64 0x01000b Mar 19 14:20 rlvasm09
crw-rw---- 1 oracle dba 64 0x01000c Mar 19 14:21 rlvasm10
And the problem is:
When i run dbca for create diskgroup, that not recognize the disk.
I will set asm_diskstring with the correctly path.
I try to create a diskgroup from command line, but i see this error.
SQL> create diskgroup DG_DATA_01 external redundancy DISK '/dev/vgora/rlvasm01' ;
create diskgroup DG_DATA_01 external redundancy DISK '/dev/vgora/rlvasm01'
ERROR at line 1:
ORA-15018: diskgroup cannot be created
ORA-15031: disk specification '/dev/vgora/rlvasm01' matches no disks
ORA-15025: could not open disk '/dev/vgora/rlvasm01'
ORA-15059: invalid device type for ASM disk
Additional information: 255

Shared disk (SAN EVA 4400) configuration for ASM on linux RHEL5

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