Configuring EM for ASM

I have installed Oracle 10g database and created default database orcl. Also I configured ASM. Now I want to manage asm through EM.

I found solution. If someone have the same problem, please follow the steps.
1. Add following bold lines to listener.ora (in windows, C:\oracle\product\10.2.0\db_1\NETWORK\ADMIN)
# listener.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
*(SID_DESC =*
*(SID_NAME = +ASM)*
*(ORACLE_HOME = C:\oracle\product\10.2.0\db_1)*
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 150.2.202.103)(PORT = 1521))
2. Restart your listener (lsnrctl stop, lsnrctl start)
3. Go to Enterprise Manager then choose Migrate to ASM from Administration page. Fill the form and click continue. then click database link on the upper right corner. (It shows home page)
4. Then click the your ip or hostname in General part. Click Targets and then you will see something like '+ASM bla bla'. click on it.
that's all.
Edited by: Munkhbayar on Sep 8, 2009 2:16 AM

Similar Messages

Configuring Disk for ASM in a Standalone environment

Hi,
I am attempting to install ASM for the very first time ! I am installing ASM in a Standalone Linux 6 environment. I am following CH3 of the 11gR2 Database Installation Guide. I have installed the Oracle ASM packages and have configured ASM.
I am now trying to configure the disk to use the ASM Library Driver
In my case, my server has a single 250 Gb SCSI disk. I have used this for the install of Linux 6. However I have left some space unformatted which I had intended to use with ASM.
when I do fdisk -l I get
Disk /dev/sde: 250.1 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000b3ade
   Device Boot      Start         End      Blocks   Id System
/dev/sde1   *           1          64      512000   83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sde2              64       30402   243685376   8e Linux LVM
Disk /dev/mapper/vg_lab3-lv_root: 10.5 GB, 10485760000 bytes
255 heads, 63 sectors/track, 1274 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_lab3-lv_swap: 4227 MB, 4227858432 bytes
255 heads, 63 sectors/track, 514 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_lab3-lv_home: 52.4 GB, 52428800000 bytes
255 heads, 63 sectors/track, 6374 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
when I do df -k I get
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/vg_lab3-lv_root
                      10079084   3435876   6131208 36% /
tmpfs                  1551236        76   1551160   1% /dev/shm
/dev/sde1               495844     52850    417394 12% /boot
/dev/mapper/vg_lab3-lv_home
                      50395844   2217864 45617980   5% /home
A couple of things I am not sure of -
Q1. Has the linux install in effect created some virtual disks i.e.
/dev/mapper/vg_lab3-lv_root, /dev/mapper/vg_lab3-lv_swap and /dev/mapper/vg_lab3-lv_home ?
Q2. Are /dev/sde1 and /dev/sde2 virtual disks in their own right or partitions of /dev/sde ?
The 11gR2 install manual states on P3-13 that I should use fdisk or parted to create a single whole-disk partition on the disk devices to use
I am not quite sure what I need to do -
Q3a. I assume I can use part of my physical disk ( i.e. /dev/sbe2 ) with ASM rather than it having to be a complete physical disk ?
Q3b. Do I simply mark /dev/sbe2 as an ASM disk using oracleasm createdisk DISK1 /dev/sbe2 ?
or do I somehow have to create a partition on /dev/sbe2 ? ( I guess this harks back to Q2. in that is sbe2 a disk or a partition ? )
any help greatly appreciated
Jim

Thanks Billy.
I have checked back to my Linux install note and indeed it does seem to create the logical volumes at that stage i.e. it creates Lv_root, Lv_home and Lv_swap. During the nistall I was offered to specify the type of installation. The following options were given -
- Use All Space
- Replace Existing Linux Systems
- Shrink Current System
- Use Free Space
- Create Custom Layout
Q1. I chose the Use All Space. However from what you are saying it looks as if I perhaps should have used the option 'Create Custom Layout'. I am guessing the use all space option is what created the Logical Volumes - is this correct and should I have used Create Custom Layout ?
I reduced lv_home from 183732 to 50000 Mb. This left 173 Gb free - I intended to use this free space with ASM
Q2. Can a single disk only have 4 primary partitions ?
I guess I am where I am now, so I am wondering how I proceed with the disk layout I have presently.
Can you clarify from my output of fdisk -l that was in my original post, what exactly I have. My understanding is as follows -
There are 3 logical volumes created : /dev/mapper/vg_lab3-lv_root, /dev/mapper/vg_lab3-lv_swap and /dev/mapper/vg_lab3-lv_home
There is then the physical volume /dev/sde. On this physical volume is /dev/sde1 and /dev/sde2
Q3. Are these partitions on that volume ?
Q4. /dev/sde1 appears to be a boot partition and /dev/sde2 appears to be the partition of 173 Gb that I did not allocate during the Linux install. Is this correct ?
Q5. Is it possible that I can now take /dev/sde2 and mark that as an ASM Disk ? I wasn't sure if creating an ASM disk is restricted to an entire physical disk or if you can use a partition ?
When I do the following as root user
/etc/init.d/oracleasm createdisk VOL1 /dev/sde2
Unable to open device "/dev/sde2" Device or resource busy
I cannot understand how this is the case - /dev/sde2 is not mounted
lsof /dev/sde2 does not show anything using /dev/sde2
/etc/init.d/oracleasm status
shows ASM is loaded and /dev/oracleasm is mounted
Any help you can offer would be greatly received.
Thanks,
Jim

How to configure Oracle Enterprise manager 11.2.0.1 for ASM instance

Hi All,
Please let us know How to configure Oracle Enterprise manager 11.2.0.1 for ASM instance.
Reagrds,
Vikas

Assuming an agent is running on the servers you want to monitor,
navigate to the Agent home page (Via setup --> Agent)
When in the agent home page select 'Add Database'and press [Go]
Assuming yopur database now gets recognized, select the Configure icon and enter the password for dbsnmp.
When done, press [Ok] to return to the agent home page.
Regards
Rob
http://oemgc.wordpress.com

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

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 .

Configuring Storage for Clusterware on Raw devices

My proposed system is:
- Sun Solaris 10
- Oracle 10G RAC
- Oracle Clusterware
- Raw devices for Clusterware files
- ASM for database flies
Assume I have appropriately sized LUNs assigned on my SAN for OCR and voting disks. My question is, how do I configure the raw devices required for these Clusterware files?
I have read the Oracle RAC/Clusterware installation guide (Sun Solaris, SPARC), which goes as far as identifying the requirements but does not give the procedure. If I wish to use raw devices for ASM, it gives a procedure for creating partitions on the LUNs. Is anything like this required for the Clusterware files (OCR and voting disks)?

As far as I know, Solaris follows the traditional raw device definition, which basically says that a raw device is a disk or a partition on a disk that does not contain a file system (yet). Given your question, this would mean that any device that you can find that does not contain a file system would be a raw device.
Message edited here:
However, you need to find the right link to this device in order to use it as a raw or character device. Otherwise, the device would be used as a block device, which means it will be buffered.
On Solaris, those character devices should be listed under /dev/rdsk, while the block device would be listed under /dev/dsk. (Please, refer to: http://www.idevelopment.info/data/Unix/Solaris/SOLARIS_UnderstandingDiskDeviceFiles.shtml)
End of update.
Therefore, you have 2 options in your case. You can create LUNs in your storage that would be just suitable to host your Voting Disks and OCRs OR you can create a bigger LUN and put an OCR and a Voting Disk on this one, AFTER you have sliced the disk (LUN) using the format command.
There is only one thing to remember: If you follow Oracle's recommendation to use multiple Votings and mirrored OCRs, it would obviously be better that those devices do not all share the same LUN (for availability reasons).
Last but not least, you may want to have a look at the following forum for a similar discussion on using RAW devices under Solaris: http://forum.java.sun.com/thread.jspa?threadID=5073358&messageID=9267900
Hope that helps. Thanks.
Message was edited by:
MarkusM

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

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.

Very first step in configuring RMAN for a Backup

DB version:10gR2
I am a DBA supporting applications development and i am not familiar with RMAN. This weekend we are going to Patch 10.2.0.1.0 to 10.2.0.3.0. Before that i am going to take a backup of the entire Database containing around 57 schemas(total of around 600gb).
We don't have Tape drives. I am going to backup this up on three filesystems in the same machine. This instance is not running on ASM. What is the first step i should be doing in configuring RMAN for a backup?
Edited by: user10583227 on Jan 27, 2009 4:50 AM

Be careful, three filesystems doesn't necessarily mean the use of three channels. Could be more...could be less.
Are you in a position to shutdown the database? If not, you'll also want to backup the archivelogs with BACKUP DATABASE PLUS ARCHIVELOG. You may also consider creating a Guaranteed Restore Point which would allow you to rollback your database in minutes if the upgrade fails.

Recommended Number LUNs for ASM Diskgroup

We are installation Oracle Clusterware 11g, Oracle ASM 11g and Oracle Database 11g R1 (11.1.0.6) Enterprise Edition with RAC option. We have EMC Clariion CX-3 SAN for shared storage (All oracle software will reside on locally). We are trying to determine the recommended or best practice number of LUNs and LUN size for ASM Diskgroups. I have found only the following specific to ASM 11g:
ASM Deployment Best Practice
Use diskgroups with four or more disks, and making sure these disks span several backend disk adapters.
1) Recommended number of LUNs?
2) Recommended size of LUNs?
3) In the ASM Deployment Best Practice above, "four or more disks" for a diskgroup, is this referring to LUNs (4 LUNs) or one LUN with 4 physical spindles?
4) Should the number of physical spindles in LUN be even numbered? Does it matter?

user10437903 wrote:
Use diskgroups with four or more disks, and making sure these disks span several backend disk adapters.This means that the LUNs (disks) should be created over multiple SCSI adapters in the storage box. EMCs have multiple SCSI channels to which disks are attached. Best practice says that the disks/luns that you assing to a diskgroup should be spread over as many channels in the storage box as possible. This increases the bandwidth and therefore, performance.
1) Recommended number of LUNs?Like the best practice says, if possible, at least 4
2) Recommended size of LUNs?That depends on your situation. If you are planning a database of 100GB, then a LUN size of 50GB is a bit overkill.
3) In the ASM Deployment Best Practice above, "four or more disks" for a diskgroup, is this referring to LUNs (4 LUNs) or one LUN with 4 physical spindles?LUNs, spindles if you have only access to physical spindles
4) Should the number of physical spindles in LUN be even numbered? Does it matter?If you are using RAID5, I'd advise to keep a 4+1 spindle allocation, but it might not be possible to realize that. It all depends on the storage solution and how far you can go in configuring it.
Arnoud Roth

Looking for disk I/O test for ASM?

We are running oracle 10.2.0.3 on RHEL4 itanium 64 bit and we are using ASM for out database storage. IN our production environemnt the disk subsystem is an EMC clarion array but in our test environment our disk subsystem is an HP MSA storage.
I am looking for a good way to test the disk I/O throughput between the 2 storage arrays when the disks are configured as oracle ASM disks?
Can ayone make any suggestions on this testing.
Thx.

Perhaps not understanding your question, but we run 10g2 on Linux RHEL with ASM on SAN and use iostat to monitor IO performance.
We implement multipathing and so run /sbin/multipath -l to discover the names of the devices and then run iostat like so:
iostat -x dm-0 dm-1 15
which will print stats every 15 seconds for the 2 named devices dm-0 and dm-1
HTH,
Peter

I need help on how to setup hardware raid for ASM.

In the « Recommendations for Storage Preparation” section in the following documentation: http://download.oracle.com/docs/cd/B28359_01/server.111/b31107/asmprepare.htm
It mentions:
--Use the storage array hardware RAID 1 mirroring protection when possible to reduce the mirroring overhead on the server.
Which is a good raid 1 configuration considering my machine setup?
“I put my Machine info below.”
Should I go for something like:
5 * raid 1 of 2 disks in each raid: disk group DATA
5 * raid 1 of 2 disks in each raid: disk group FRA
Then ASM will take care of all the striping between the 5 raids inside a disk group right?
OR, I go for:
1 * raid 1 of 10 disks: disk group DATA
1 * raid 1 of 10 disks: disk group FRA
In the second configuration, does ASM recognize that there are 10 disks in my raid configuration and stripes on those disks? Or to use ASM striping, I need to have lots of raid in a disks group?
Here is my Machine Characteristics:
O/s is Oracle Enterprise Linux 4.5 64 bit
Single instance on Enterprise Edition 10g r2
200 GIG database size.
High "oltp" environment.
Estimated growth of 60 to 80GIG per year
50-70GIG archivelogs generation per Day
Flashback time is 24 hours: 120GIG of flashback space in avg
I keep a Local backup. Then push to another disk storage, then on tape.
General Hardware Info:
Dell PowerEdge 2950
16 GIG RAM
2 * 64 bit dual core CPU's
6 * local 300G/15rpm disks
Additional Storage:
Dell PowerVault MD1000
15 * 300G/15rpm Disks
So I have 21 Disks in total.

I would personally prefer the first configuration and let ASM stripe the disks. Generally speaking, many RAID controllers will stripe then mirror (0+1) when you tell it to build a striped and mirrored RAID set on 10 disks. Some will mirror then stripe (1+0) which is what most people prefer. That's because when a 1+0 configuration has a disk failure, only a single RAID 1 set needs to be resync'd. The other members of the stripe won't have to be resynchronized.
So, I'd prefer to have ASM manage 5 luns and let ASM stripe across those 5 luns in each disk group. It also increases your ability to reorganize your storage if you need 20% more info in DATA and can afford 20% less in FRA, you can move one of your RAID 1 luns from FRA to DATA easily.
That's my 0.02.

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

Listerner needed for ASM

Hi,
Oracle 11.1.0.6 on OEL 4 64 bit.
We already had an install that was not using ASM.
So I installed Oracle into another home and configured ASM. I now notice that it has started its own listener on port 1522. Is there a reason why there has to be a dedicated listerner for ASM?
Thanks
Pete

11g configures its own listener but there is no need for listener for ASM.Oracle doesn't do that.ASM doesn't do any connections except with the database which it is maitaining.
Aman....

Patching method for ASM RAC environment

We are planning to apply new PSU, RAC bundle and CRS PSU for our pre-production environment. In oreder to reduce risk as well as downtime, we need a better approach for patching. Could you please clarify bellow concerns ?
1) Do we sync the ASM Oracle Home as per the RDBMS Oracle Home? - as per best practice we could see we supposed to sync up both oracle homes, but there are some one-off patches which meaned only for ASM home, thats why at present our ASM and RDBMS homes are not in sync. Could you please put some light on advantages and disadvantages of doing this.
2) We are planning to apply 11.1.0.7.1 PSU for RDBMS and 11.1.0.7.2 PSU for CRS. In this case do you suggest to apply RDBMS component of CRS PSU ?
3) For reducing downtime, we are planning to patch one oracle rdbms / ASM home and making a gold copy to clone all other nodes ? Is it a recommended method ? What is the risk involved in this ?
Thanks
Rupesh
http://orachat.com/

1. The advantage patching both ASM and RDBMS homes is if ASM home is corrupted or some issues then you can start the ASM instance from RDBMS home will out any issues(bugs).
2.Yes, always it is recommended
3.Why you want a gold copy? Please note that if you have EM setup then configuration files are different between nodes. The best approach is applying patch local, so that you can reduce the downtime.
$ opatch apply -local
Hope this helps,
Regards,
http://www.oracleracexpert.com
Migrate Database to ASM using RMAN
http://www.oracleracexpert.com/2009/10/migrate-database-to-asm-using-rman.html
Change spfile from pfile in RAC
http://www.oracleracexpert.com/2009/09/create-spfile-from-pfile.html

Configuring EM for ASM

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