Voting disk and OCR disk in RAC

Can anyone explain me in basic terms ...
For what Voting and OCR disk are used in RAC.

Hi Francisco,
Thanks for the information.
But i am having lot of doubts in Voting disk and types of heart-beats present in Oracle 10g RAC.
As Oracle says css uses two heart beats 1. Network heart-beat 2. Disk heart-beat
My doubts:
1. How Oracle uses voting disk to avoid split-brain syndrome? OR what is the role of voting disk in split-brain syndrome?
2. How Oracle monitors remote node health?
3. Oracle says there is one more heart-beat where ckpt process keep on writing to control file for every 3 seconds and if it fails lmon process will evict the node....Is it true?
5. Oracle Clusterware will send messages (via a special ping operation) to all nodes configured in the cluster, often called the "heartbeat." If the heartbeat fails for any of the nodes, it checks with the Oracle Clusterware configuration files (Voting disk) to distinguish between a real node failure and a network failure......Is it true? If true then what about the two heart beats(Network and Disk)...why these heart-beats are present or useful?
If possible please clear my doubts by giving some simple examples....
Awaiting for your reply and too much eager to learn and expertise in Oracle RAC architecture before administering it.
Regards,
Yasser.

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Backup and Restore OCR,Voting Disk and ASM Disks in new SAN-10g RAC

Dear Friends,
I am using 10g R2 RAC serup on Linux
My OCR,Voting Disk and ASM Disk for DBF Files are on a SAN box
Now i am reorganising SAN by scrapping the entire SAN and cretaing new LUN's (It's a must)
so pleae let me know
1) how do i take backup of OCR and Voting Disk from existing SAN and how do i restore it in new LUN's after SAN reorganisation
2) how do i take backup of existing Database's from existing SAN and how do i restore it in new LUN's after SAN reorganisation.
I will be doing it in Planned downtime only
Regards,
DB

For step 1 you should following metalink doc.
For step 2 here is simple backup command script.
I have done this in windows for you.
D:\app\ranjit\product\11.2.0\dbhome_1\BIN>rman target /
Recovery Manager: Release 11.2.0.1.0 - Production on Wed Feb 8 21:48:47 2012
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (DBID=1299593730)
RMAN> run
+{+
allocate channel c1 device type disk format 'D:\app\ranjit\rman\%U';
allocate channel c2 device type disk format 'D:\app\ranjit\rman\%U';
backup database;
backup current controlfile format 'D:\app\ranjit\rman\%U';
+}+
Regards

Why logical partition is a must for voting disk and OCR

Hi Guys,
I just started handling jobs for RAC installation, I have a simple question regarding the setup.
Why does logical partition have to be used for voting disk and OCR?
I tried partition the disk that were provisioned for voting disk and OCR with primary partition but when OUI is trying to recognize the disk, it cannot find the disk that has been partitioned with primary partition.
Thank you,
Adhika

Hello Adhika,
I found it on this doc http://download.oracle.com/docs/cd/B28359_01/install.111/b28250/storage.htm
Be aware of the following restrictions for partitions:
* You cannot use primary partitions for storing Oracle Clusterware files while running the OUI to install Oracle Clusterware as described in Chapter 5, "Installing Oracle Clusterware". You must create logical drives inside extended partitions for the disks to be used by Oracle Clusterware files and Oracle ASM.
* With 32-bit Windows, you cannot create more than four primary disk partitions for each disk. One of the primary partitions can be an extend partition, which can then be subdivided into multiple logical partitions.
* You can assign mount points only to primary partitions and logical drives.
* You must create logical drives inside extended partitions for the disks to be used by Oracle Clusterware files and Oracle ASM.
* Oracle recommends that you limit the number of partitions you create on a single disk to prevent disk contention. Therefore, you may prefer to use extended partitions rather than primary partitions.
For these reasons, you might prefer to use extended partitions for storing Oracle software files and not primary partitions.
All the best,
Rodrigo Mufalani
http://www.mrdba.com.br/mufalani

I need help with boot camp. "Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again."

This message appears every time I try to partition my disk:
"Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again."
I verified my Macintosh HD disk on Disk utility and then tried to repair it, but I am unable to click the repair button.
It says it's not available because the startup disk is selected.
I don't know what to do or how to go about both these problems.
Please, any suggestions?

This message appears every time I try to partition my disk:
"Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again."
I verified my Macintosh HD disk on Disk utility and then tried to repair it, but I am unable to click the repair button.
It says it's not available because the startup disk is selected.
I don't know what to do or how to go about both these problems.
Please, any suggestions?

Boot camp probl"back up disk and use disk util. to reform as single MAC OS.

The disk cannot be partitioned because some files cannot be moved.
Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again.
I am trying to install win 7 32 bit but before i partition my mac osx an error message pops up with the above wording...I went to disk utility and it is already a single mac osx (journaled). any help would be great and much appreciated..thank you for viewing.

The error message must be the title of 100s of threads.
Do you know how to backup?
It can't move files, some are fixed, the free space has to also be unfragmented contiguous chunk at the end of the drive.
Disk Utility Restore tab (and Help menu).
and of course external backup drive. And backup is step #1. There is a PDF you can save or print from the Boot Camp Assistant.
If you only have TimeMachine for backup you might want to install OS X anyway on a small 30GB partition (shrink partition size) or use your OS X DVD.
From OS X DVD go to Utility and then Disk Utility. Restore to another drive and that should be then bootable.
Or pick up SuperDuper or Carbon Copy to clone-backup and use one of those.
iDefrag $$ may be able to optimize the free space.
But it is wiser to first insure any data and files are backed up before changing or installing another OS, and before changing partitions around.

My MBP won't boot anymore after "repair disk" and "repair disk permission"

My 2011 MBP 15 with Lion stopped working after I attempted to use Disk Utility to "repair disk" and "repair disk permission".
It was having weird issues before I attempted the repairs, it was freezing every few seconds no matter what I am doing, the whole thing would freeze with only the mouse movable. then after a few seconds it goes back to normal again. This happened after I downloaded and installed some updates from Apple. I don't know if the updates would cause this or it's something else.
In Disk Utility, "Repair Disk Permission" took 5 hours. While "Repair Disk" resulted in "Disk utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed up files".
Now when it boots, there's a loading bar under the Apple logo, it loads half way and shuts down itself.
I can still get into CMD+R Utilities though.
Any idea how I can extract the data out of the disk? I'm going to format and do a clean install.

mike2016 wrote:
This happened after I downloaded and installed some updates from Apple. I don't know if the updates would cause this or it's something else. Now when it boots, there's a loading bar under the Apple logo, it loads half way and shuts down itself.
A stopped loading bar is indicative of a failed firmware install that didn't complete, it's trying to install and is failing.
Do a PRAM reset
https://support.apple.com/kb/HT1379
Reboot into Safe Mode, (shift key down) then reboot normally and see if that fixes the issue.
https://support.apple.com/kb/TS2570
You may have to try to reinstall your firmware manually, you'll need another disk burning Mac
Find your exact firmware(s) here (or on Apple Downloads page)
https://support.apple.com/kb/HT1237
Apply instructions here
https://support.apple.com/kb/HT2213
Lastly it could be your boot drive is failing or something wrong happened with the update and accounting for all the to the other issues.
A OS X "overwrite" may solve the issue, may not.
See 10.5, 106. 10.7 OS X "overwrite" here
https://discussions.apple.com/message/16276201#16276201

Startup disk and scratch disk full messages

I use my mac a lot for digital photography. I use iPhoto to catalog, and PS Elements 3 to edit. I've been getting messages that my startup disk is full, and my scratch disk(s) are full; I can no longer save or print images from PSE3.
Please help me understand what these messages mean, and what steps I need to take to empty my startup disk and scratch disk.
Thanks
Greg

Greg:
As big as you can afford. There are 160 G external FW drives that are pretty reasonable. I've used the Mercury elite drives from OtherWorldComputing and have been happy. I'm sure others will pipe in with their good experiences with other brands.
Since the Mini doesn't have FW800 capability you can save a little by getting a USB2/FW400 model instead of the USB2/FW400/800 one. However, if you ever upgrade your Mac it probably will have an FW800 port. The price difference is about $25.
This link is for the Mercury Elite-AL Pro FireWire 800/400+USB2 and shows the prices for each type and size.
The The Mercury Elite Pro Classic is what I have. The price difference between the the two types is about $25.
If you can afford a larger one then do get it as you could then partition it to clone you current drive to one partition and make it a bootable partition in case of problems with your internal drive. Then use the other partition for long term storage, and day to day backups of user documents, etc. Even put you iPhoto and iTunes libraries on it.
With CompUSA going out of business in a lot of places you might find a very good deal on some external FW drives. Be sure to get one with FW so it can be bootable.
LaCie's drives are very popular also. CompUSA has a LaCie d2 Extreme Triple Interface 250GB Hard Drive for $179. If you have a store near you go into it and see what they have on the floor. Some don't have extra FW ports for daisy chaining. The OWC's do.

Voting disk and OCR creation

dear all,
Am installing 11gr2 on solaris 10 update 6. We are planning to have ASM also. So I created 3 users
oraasm-ASM OWNER
oracrs-clusterware owner
oracle-oracle database owner.
Now the question is :
Do I have to configure SSH for all the 3 users ?.
Clusterware installaltion should be done by oracrs user and database installation should be done by user ORACLE ?
How to create Voting RAW Disk and CRS RAW DISK ?
I create 2 directories in
bash-3.00$ cd /test/u03/TEST/
bash-3.00$ ls
OCR VOTE
bash-3.00$ dd if=/dev/zero of=/test/u03/TEST/OCR bs=1024 count=100
dd: /test/u03/TEST/OCR: open: Is a directory
Do I have to user root ?
Please advise as am familiar with installation in windows only
Kai

Hi,
Link:[Duplicate thread|http://forums.oracle.com/forums/thread.jspa?threadID=1014776&tstart=0]
Please avoid duplicate thread in multiple categories.
Regards,
X A H E E R

What is the difference between Logical Disk and Physical Disk?

Hi.
When I do Performance Monitor, I got Logical Disk Avg. Disk sec/Write counter and Physical Disk Avg. Disk sec/Write counter.
But I can see the different Avg. value and Max. value.
Even if Logical and Physical Disk are one-to-one mapping.
Why did i get the result?
One the other hands, I got a same result that Logical Disk Avg. Disk sec/Read counter and Physical Disk Avg. Disk sec/Read counter's Avg. value and Max. value.

Physical Disk refers to an actual physical HDD (or array in a hardware RAID setup), whereas Logical Disk refers to a Volume that has been created on that disk.
So if you have one disk with one volume created on it then the values are likely to be 1 to 1, but if you have multiple volumes on the disk, for instance a physical disk with C:\ and D:\ volumes running on it, then the logical disks relate to c:\ and d:\
rather than the disk they're running on.
See
http://blogs.technet.com/b/askcore/archive/2012/03/16/windows-performance-monitor-disk-counters-explained.aspx for a more in depth explanation.

Photoshop software on disk and no disk drive

I've just received my adobe photoshop CS6 on disk and I'm waiting for my new MacBook Pro with retina display to arrive... Just realised it doesn't have a disk drive. Can I just transfer p'shop files to external hardrive and install it from there?

Use or borrow a Superdrive, You could make a DMG (disk image) on an external HD, however I cant recall if the strong copy protection disk will allow same.
http://store.apple.com/us/product/MD564ZM/A/apple-usb-superdrive

Voting and OCR disk mirroring

Hi all,
I my trying to create mirror of OCR and Voting disk in Oracle RAC 10gR2 on windows 2003.How to recoganize the location/path of raw file system to place my OCR/Voting disk.
Thanks and Regard's
Awanish Kumar

Hi Awanish,
You can use diskpart utility to build new raw partitions.
To show location from your OCR search a key on Windows registry
[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\Ocr]
To show location from Voting Disks use
%CRS_HOME%\bin\crsctl query css votedisk
To mirror these important files use ocrconfig and crsctl utilities.
Regards,
Rodrigo Mufalani
http://mufalani.blogspot.com

OCFS2 , ASM and Raw Device for Voting Disk and OCR

Dear all ,
My manager assigned me to establish a 11gRAC , 3 node on OEL. He likes to locate ASM with datafiles , at the same time, 2 OCR vol on OCFS2 and RawDevice respectively , 2 voting disks on OCFS2 and RawDevice respectively also.
This really annoys me .
Oh all experts, could anybody give me some advices ? Can those stuff be co-existed ?

Billy Verreynne wrote:
MccLok wrote:
My manager assigned me to establish a 11gRAC , 3 node on OEL. He likes to locate ASM with datafiles , at the same time, 2 OCR vol on OCFS2 and RawDevice respectively , 2 voting disks on OCFS2 and RawDevice respectively also. Not a great idea to introduce additional s/w layers between the CRS software and its OCR and voting disks. If ocfs2 is for example used as a shared file system for these devices (files), then the ocfs2 cluster s/w needs to be up and running, the shared devices mounted, before CRS can successfully start. Thus any problem with the ocfs2 stack, will impact on CRS. Why? What does ocfs2 buy you in this regard? What are the benefits that justifies the increased complexity and the dependency of CRS on another s/w layer?
Fewer moving parts means less complexity, less stuff that needs to be configured and can go wrong.In fact, some users had perception that " Pay mroe so that Get more".

I name each photo buy replacing the jpeg number with the name. when I burn to disk and open disk the name is not shown. how do I get the name given to show on the burn disk?.

after I burn the files to dvd and load to view the name does not appear. How do I get the name listed to appear on the burn disk instead of the file number?

Naming the Photo - or giving it a title - is not the same as naming file.
How are you burning to dvd? With iPhoto? If so then the Title will be available in any app that understands basic metadata.
If you want the title available in the Finder - which does not understand photo metadata - then you'll need to export the file
File -> Export
In the resulting dialogue you'll see a heading for 'File Name'. Choose 'Use Title' from the drop down.
Regards
TD

Cant mount disks and flash disks on my system

Hi guys,
am using solaris 10 on vmware am trying to mount my flash and disk but i cant i read book that say if use
devfsadm (to mount a disk drive)
svcadm restart volfs (to mount a flash disk)
but this doesnot work

What is the output for
# devfsadm -v
# svcs -l volfsCheers
Andy

OCR and vote disk Allocation for shared raw storage with Solaris 10 questio

Hi all,
Current environment is Solaris 10 SPARC 64 bit OS with Hitachi SAN for shared storage and Sun E6900 servers.
For Oracle 10g RAC (10.2) and ASM, I am setting up the vote disk and OCR files on shared raw storage area network.
Assume that I have a 35Gb LUN carved out on raw device for the vote disk and OCR for a 2-node Oracle 10g RAC cluster and since the vote disk and OCR only require 120MB of storage, is there a way to use only a 120MB slice from the LUN or do I need to allocate the entire LUN/raw device to the vote disk?
I am looking for a way to avoid wasting space for the OCR and vote disk with my 10g RAC cluster and we are using raw devices and Oracle 10g RAC Clusterware with Veritas filesystem for the disk management. Can I have several slices on Solaris 10 with raw shared storage (Hitachi) to triple mirror my OCR and vote disk files?
It seems odd to have to use an entire 35GB LUN just for 2 small files: vote disk and OCR. Is there a way to partition a 120MB slice on one of the devices and allocate the rest to ASM?

Hi
In our RAC env.
we have 1GB LUN for OCR and Voting Disk and 100GB LUN for ASM disk. we have 4 Node RAC env on AIX with 2 SAN storage on Hitachi system for our Application.
we keept 1st Voting diks on SAN-1 2nd Voting Disk on SAN-2 and third voting on SAN-3.
OCR disk on SAN1 and OCR_MIRROR Disk on SAN-2.
we have ASM DIsk with Normal Redundancy . Failure Group 1 on SAN-1 and
Failure Group 2 on SAN-2
Regards
Bharat

Voting disk and OCR disk in RAC

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