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.

Similar Messages

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

SAN for ocr and vote file for Linux RAC

Hi Experts,
Based on Oracle document, i have to create 2 devices for the OCR and 3 for the VOTE in RAC.
However, my boss think SAN maybe mirroe OCR and Vote file. It is enough for 1 location in SAN storage. It does not matter how many driver sidplay for user.
Actually it is only one SAN in back side.
Any Explain for OCR/VOTE file in SAN?
Thnaks
JIm

The idea to have these multiplex copy is to reduce the single point of failure, non the less, that's reason you build RAC in the first place isn't?
So if it's possible you'd better have redundancy on physical disk level (LUN etc) then logic level (volume, partition etc) then file level.
Well I agree modern SAN are pretty reliable and had built in redundancy on physical and logic level, but if you only have single vote disk and OCR, your RAC is going to fail right away when vote disk and OCR has problem. The chances are if your OCR and Vote disk has logical corruption, the corruption is going to populated to your mirrors. Even if your mirror is good you still need to get mirror copy to replace working copy and restart cluster during the time your RAC is offline.
With more than one OCR and voting disk, your RAC is likely to survive single OCR/vote disk failure, so you can fix the problem while RAC online.

Bootcamp XP partition size for OCR software and Outlook

Hello,
I need to run OCR software (Abbyy Finereader 9) and Microsoft Outlook email on my Mac. How much space should I partition for Windows XP when setting up Bootcamp? I will eventually use Parallels/VMwareFusion.
Specs needed for OCR: 512 MB of RAM, plus 512 MB of RAM for each additional processor core.
500 MB of hard-disk space for typical installation and 512 MB of hard-disk space for program operation.
Any help would be appreciated. Thanks

You realize we are talking GBs of RAM and hard drive space, but you don't say how much you have free now, how much Mac is using, but I can tell you far too many look at how small and then want to resize, rather than give it 2x what you think you need, an old 'rule of thumb.'
Apple's mininum is too low, which is 10GB. XP SP3 and updates ?
So, first question, how large a hard drive do you have?
Did you backup already?
I'd set aside 30GB as NTFS as a starting point.

Shared file system recomended for OCR and voting Disk in 10g R2

Dear Friends,
For Oracle 10g R2 (10.2.0.5) 64 bit which shared file system is recomended for OCR and voting Disk (NFS / raw devices / OCFS2)
For Datafiles and FRA i planned to use ASM
Regards,
DB

Hi,
If your using standard edition then you got no choice but raw devices
http://docs.oracle.com/cd/B19306_01/license.102/b14199/options.htm#CJAHAGJE
for ocfs2 you need to take extra care
Heartbeat/Voting/Quorum Related Timeout Configuration for Linux, OCFS2, RAC Stack to Avoid Unnecessary Node Fencing, Panic and Reboot [ID 395878.1]

NTFS vs ext3 for a Shared Partition?

Since the journaling of ext3 is disabled when it is accessed through windows, would it be better to just use NTFS on a shared partition, or does NTFS have any disadvantages as well?

I've used NTFS for sharing data between my Linux and Windows installations for years, and I've never had any problems. You'll probably want to defrag it occasionally though. I defrag my shared partition once every four months or so, if I can be bothered.
Just don't do what some new converts try to do and make your entire home folder an NTFS partition. Just mount --bind, or symlink, the shared partitions's Documents/Videos/Music/etc. folders onto their corresponding /home/user folders.
If that's what you're planning on doing.

Confusion with OCFS2 File system for OCR and Voting disk RHEL 5, Oracle11g,

Dear all,
I am in the process of installing Oracle 11g 3 Node RAC database
The environment on which i have to do this implementation is as follows:
Oracle 11g.
Red Hat Linux 5 x86
Oracle Clusterware
ASM
EMC Storage
250 Gb of Storage drive.
SAN
As of now i am in the process of installing Oracle Clusterware on the 3 nodes.
I have performed these tasks for the cluster installs.
1. Configure Kernel Parameters
2. Configure User Limits
3. Modify the /etc/pam.d/login file
4. Configure Operating System Users and Groups for Oracle Clusterware
5. Configure Oracle Clusterware Owner Environment
6. Install CVUQDISK rpm package
7. Configure the Hosts file
8. Verify the Network Setup
9. Configure the SSH on all Cluster Nodes (User Equivalence)
9. Enable the SSH on all Cluster Nodes (User Equivalence)
10. Install Oracle Cluster File System (OCFS2)
11.Verify the Installation of Oracle Cluster File System (OCFS2)
12. Configure the OCFS2 (/etc/ocfs2/cluster.conf)
13. Configure the O2CB Cluster Stack for OCFS2
BUT, here after i am a little bit confused on how to proceed further. The next step is to Format the disk and mount the OCFS2, Create Software Directories... so and so forth.
I asked my system admin to provide me two partitions so that i could format them with OCFS2 file system.
He wrote back to me saying.
*"Is what you want before I do it??*
*/dev/emcpowera1 is 3GB and formatted OCFS2.*
*/dev/emcpowera2 is 3GB and formatted OCFS2.*
*Are those big enough for you? If not, I can re-size and re-format them*
*before I mount them on the servers.*
*the SAN is shared storage. /dev/emcpowera is one of three LUNs on*
*the shared storage, and it's 214GB. Right now there are only two*
*partitions on it- the ones I listed below. I can repartition the LUN any*
*way you want it.*
*Where do you want these mounted at:*
*/dev/emcpowera1*
*/dev/emcpowera2*
*I was thinking if this mounting techique would work like so:*
*emcpowera1: /u01/shared_config/OCR_config*
*emcpowera2: /u01/shared_config/voting_disk*
*Let me know how you'd like them mounted."*
Please recommend me what i should convey to him so that i can ask him to the exact same thing.
My second question is, as we are using ASM, for which i am gonna configure ASM after clusterware installation, should i install Openfiler??
Pls refer the enviroment information i provided above and make recommendations.
As of now i am using Jeffery Hunters guide to install the entire setup. You think the entire install guide goes well with my enviroment??
http://www.oracle.com/technology/pub/articles/hunter_rac11gr1_iscsi.html?rssid=rss_otn_articles
Kind regards
MK

Thanks for ur reply Mufalani,
You have managed to solve half part of my query. But still i am stuck with what kind of mount point i should ask the system admin to create for OCR and Voting disk. Should i go with the mount point he is mentioning??
Let me put forth few more questions here.
1. Is 280 MB ok for OCR and voting disks respectively??
2. Should i ask the system admin to create 4 voting disk mount points and two for ocr??
3. As mentioned by the system admin.
*/u01/shared_config/OCR_config*
*/u01/shared_config/voting_disk*
Is this ok for creating the ocr and voting disks?
4. Can i use OCFS2 file system for formating the disk instead of using them as RAW device!!?
5. As u mentioned that Openfiler is not needed for Configuring ASM... Could you provide me the links which will guide me to create partition disks, voting disks and ocr disks!! I could not locate them on the doc or else were. I did find a couple of them, but was unable to identify a suitable one for my envoirement.
Regards
MK

11.2.0.3 grid installation fails while selecting OCFS2 for ocr files

We are installing 11GR2 (11.2.0.3) cluster on a 64 bit system. we have OCFS2 filesystem for shared devices. version 1.6.3.
While selecting ocr file locations , we get the following error
[INS-41321] Invalid oracle cluster register [OCR] Location
Cause- The installer detects that the storage type of location is not supported for Oracle Cluster registery
Action - Provide a supported storage location for the Oracle Cluster Registry
Additional information
/crp2db01/OCR/ocr_1 is not shared
However , this mountpoint is shared across both the nodes.
Note: 11201 grid installation was successful and it accepted the above locations for OCR. however ,we need 11.2.0.3 cluster for 11.2.0.3 database

As for your current problem, just because Oracle "allows" OCFS2 in a GRID environment, I would never suggest nor implement that. It adds a layer of complexity that is totally unnecessary when a GRID/ASM implementation performs circles around OCFS2. ASM is much easier to manage, maintain, expand and shrink than OCFS2. Especially at version 11.2.0.3. When working at a large telco a few years ago, we had a 300TB+ ASM environment. OCFS2 could not even begin to be that big. ASM will provide you a MUCH more stable environment than OCFS2. And with ASM there is a lot of "magic" that happens with OCR/Voting that makes your life MUCH easier. If you "require" shared application files, then use ASM/ACFS. It is a much better "volume manager" than OCFS2.
Since you must present devices to the system for OCFS2, you should not have any problems doing the same for ASM. (and don't use ASMLib as it is going away and is not necessary - just make sure you use a partition that skips the first 1M (usually cylinder 1) and you should be good to go!)
I also would not use a "shared ORACLE_HOME" on either ACFS or OCFS2. The biggest reason is that you lose the ability to do a "rolling" upgrade and when you have a VLC, that becomes much more important that saving a few GB worth of storage.
I would also pay attention to this:
http://docs.oracle.com/cd/E11882_01/install.112/e22489/storage.htm#CDEDAHGB
3.1.4.2 General Storage Considerations for Oracle RAC
Use the following guidelines when choosing the storage options to use for each file type:
You can choose any combination of the supported storage options for each file type provided that you satisfy all requirements listed for the chosen storage options.
If you plan to install an Oracle RAC home on a shared OCFS2 location, then you must upgrade OCFS2 to at least version 1.4.1, which supports shared writable mmaps.
Oracle recommends that you choose Oracle ASM as the storage option for database and recovery files.
For Standard Edition Oracle RAC installations, Oracle ASM is the only supported storage option for database or recovery files.

While installing Clusterware cannot see raw shared partitions

I have made 4 extended logical drives from EMC shared storage to be visible from my two nodes on 64bit windows 2003 server. During Clusterware installation while selecting the disks for OCR and Voting file, I cannot see the raw shared volumes.
The following is the output of cluvfy utility for component shared storage accessibility,
# runcluvfy.exe comp ssa -n node1,node2
Verifying shared storage accessibility
Checking shared storage accessibility...
Shared storage check failed on nodes "node2,node1".
Verification of shared storage accessibility was unsuccessful on all the nodes.
I also get exectask.exe encounter a problem and needed to close meassage aswell.
[email protected]

The issue is resolved. I formatted the shared disks with NTFS file system. Then deleted the partition and recreated extended logical volumes and now the shared storage is accessible from the clusterware instalation for the selection of ocr and voting files.
#cluvfy comp ssa -n node1,node2
The above command on 64bit win2003 servers gives error. This is due to bug 6007675. Base Bug number is 4714708. So the solution is to continue with the installation and ignore the error message.
[email protected]
Sami Malik

EVA 4400 disk performance

Hi
We're running HP blade system on Hyper-V 2008 R2 cluster with EVA 4400 storage.
EVA has two disk groups
- diskgroup 0 (enclosuer 0) with 10 FC disks 400GB 10k
- diskgroup 1 (enclosure 1) with 8 FC disks 300GB 15k
We're dealing with a high impact on disk I/O performance on SQL servers running on Hyper-V hosts on VM (Win2008 + SQL 2008).
R/W performance is between 20-30MB/s, but only on servers running SQL. On all other VM servers without SQL performance is between 50-60MB/s.
We have already consulted with Microsoft support, they didn't find any issues with cluster or VM, also there is no other HW impact on performance.
The only conclusion by our appinion is that SQL servers are generating so many I/O requests, that EVA or HBA on hosts can't handle that.
Is this true, or how can we check that ? SQL profiler show normal activity, also there is no other issues with operating sistem, so we're certain that there must be some kidn of connection between VM - HOST - EVA.
Also running RW test directly on a host connected to EVA, Read results are between 200-300MB/s, but Write is between 60-100MB/s.
Any additional points how to proceed next are welcome.
Regards,
Miha

I think it might be beneficial to take a look at the array performance statistics. The evaperf can be found at c:\Program Files\Hewlett-Packard\EVA Performance Monitor if it is selected during CommandView installation. Some useful stats to collect are:
evaperf cs –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > controller.csv
evaperf hps –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > hostport.csv
evaperf vd –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > vdisk.csv
evaperf pdg –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > diskgroup.csv
evaperf pda –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > disk.csv
evaperf vdg –cont 60 -dur 3600 -csv -ts2 -sz xxxx-xxxx-xxxx-xxxx > vdiskgroup.csv
where xxxx-xxxx-xxxx-xxxx is the world wide name of the array e.g. 5000–1FE1–5000–A9F0. You can probably find it on the controller LCD or some serial number label sticker at the back.
Because window server command prompt does not support running command at the background (at least I do not know how) unlike hp-ux server, you will have to open several command prompt window and run these command at the same time. Then probably zip and posted it somewhere so that we can all take a look.
the 60 here means we make one collection every 60 seconds, and -dur 3600 means for a duration of 3600 seconds which is one hour. For a start, we do not want to collect huge amount of data. We probably want to collect one set when array has no problem, and one set when array has problem, then make a comparison

Creation of secondary indexes for table "RSBATCHCTRL_PAR" failed

Hi ,
We have installed EHP1 on our BI7.0 system successfully, later we are trying to apply SPS01 for this EHP but we got the follwoing error during TBATG conversion.
2 EGT092 Conversion of table "RSBATCHCTRL_PAR" was restarted
2 EGT241 The conversion is continued at step "6"
2 EGT246 Type of conversion: "T" -> "T"
2 EGT240XBegin step "RSBATCHCTRL_PAR-STEP6":
4 EGT281 sql:
4 ED0314 CREATE
4 ED0314 INDEX [RSBATCHCTRL_PAR~DB] ON [RSBATCHCTRL_PAR]
4 ED0314 ( [JOBNAME] ,
4 ED0314 [JOBCOUNT] ,
4 ED0314 [SERVER] ,
4 ED0314 [HOST] ,
4 ED0314 [WP_NO] ,
4 ED0314 [WP_PID] ,
4 ED0314 [PROCESS_TYPE] )
4 ED0314 WITH ( ONLINE=OFF )
4 ED0314 ON [PRIMARY]
2 ED0314 Line 1: Incorrect syntax near '('.
3 EDA093 "DDL time(___1):" ".........6" milliseconds
2EEGT236 The SQL statement was not executed
2EEDI006 Index " " could not be created completely in the database
2EEGT221 Creation of secondary indexes for table "RSBATCHCTRL_PAR" failed
2EEGT239 Error in step "RSBATCHCTRL_PAR-STEP6"
2 EGT253XTotal time for table "RSBATCHCTRL_PAR": "000:00:00"
2EEGT094 Conversion could not be restarted
2 EGT067 Request for "RSBATCHCTRL_PAR" could not be executed
1 ED0327XProcess..................: "ferrari_12"
1 ED0302X=========================================================================
1 ED0314 DD: Execution of Database Operations
1 ED0302 =========================================================================
1 ED0327 Process..................: "ferrari_12"
1 ED0319 Return code..............: "0"
1 ED0314 Phase 001................: < 1 sec. (Preprocessing of TBATG)
1 ED0314 Phase 002................: < 1 sec. (Partitioning)
1 ED0309 Program runtime..........: "< 1 sec."
1 ED0305 Date, time...............: "03.06.2009", "12:47:21"
1 ED0318 Program end==============================================================
1 ETP166 CONVERSION OF DD OBJECTS (TBATG)
1 ETP110 end date and time : "20090603124721"
1 ETP111 exit code : "8"
1 ETP199 ######################################
System properties:
SAP - BI7.0 with EHP1
Database - MSSQL 2000
OS - Windows2003
Please suggest.
Thanks in advance,
Pavan.

> We have installed EHP1 on our BI7.0 system successfully, later we are trying to apply SPS01 for this EHP but we got the follwoing error during TBATG conversion.
> 2 ED0314 Line 1: Incorrect syntax near '('.
> 3 EDA093 "DDL time(___1):" ".........6" milliseconds
> 2EEGT236 The SQL statement was not executed
This is a known problem with SQL Server 2000, see
Note 1180553 - Syntax error 170 during index creation on SQL 2000
I highly suggest upgrading to SQL Server 2005 or 2008.
Markus

How can I delete a self mounting shared partition in Keychain ?

Hi,
When you accept to store username & password of a shared partition or folder in Keychain, later they are set to automount and log by themselves. How can I later delete those username & password from Keychain ?
I tried but Keychain is not easy to go through.
Regards.

Keychain Access First Aid, select the login.keychain, and the search for the keychain you want to delete. When you find it, highlight it, and hit the delete key.

Dual booting /w mac mini and shared partition

I bought a mac mini a few months ago, I wanted to replace an old macbook which died.
It had osx 10.4 on it, probably a beta or early bootcamp. I had a tri-boot system with
a "shared partition", but when I've tried on my mini I get into problems.
I'd like to have at least a windows 7, and osx partition and a larger, shared partition on same drive.
On my last attempt I left the drive as single osx. Let boot camp partition it, booted to cd, installed..
After installing, and updating, windows I partitioned the drive for the "shared partition" and rebooted.
I could reboot into windows but osx would hang while booting. I had to download and re-install the system.
BTW I am using a usb cd/dvd-rw drive to boot into my windows cd
Can someone help me figure out what I did wrong or provide a howto, guide or link to get me through this?
Thanks for visiting
Geo

What year/model Mac mini, new, used? What Mac OS are you using?
Pre 10.7 you could add two OS's and an extra partition without too much problem (running rEFIt, BootLoader, etc) but 10.7 added a wrinkle to that.
With Lion and any other OS (10.7 and Windows, etc.) you actually already have a "triple boot" system with the invisible "Repair Partition" added and Apple doesn't support any more.
Here's an older post but basically the same answer except with Lion and W7 adding an exception to the rule.
People have added more partitions but you would have to do a search here or do a Yahoo/Google to find the directions for doing it on one HD.
(I've only used rEFIt and it worked fine for me, not doing it on one HD, I have a MacPro so it's easier to just use another HD)
Other options,
You can always install the Mac OS on an external HD or even have the external as your Data drive or depending on how large or how many files you want to transfer there's also the Thumb drives.
And there's also Parallels/VMWare that you can use to transfer stuff until you need to boot into Windows natively.

How to create DB partitioning in active data tables for ods?

hi all,
Can anyone let me know how to create DB partitioning in active data tables for ods. if any docs pls share with me at my email id : [email protected]
regds
haritha

Haritha,
The following steps will briefly explain you to improve the performance in terms of DB partitioning as well as loading. Please find the same,
transaction RSCUSTA2,
oss note 120253 565725 670208
and remove 'bex reporting' setting in ods if that ods not used for reporting.
hope this helps.
565725
Symptom
This note contains recommendations for improving the load performance of ODS objects in Business Information Warehouse Release 3.0B and 3.1 Content.
Other terms
Business Information Warehouse, ODS object, BW, RSCUSTA2, RSADMINA
Solution
To obtain a good load performance for ODS objects, we recommend that you note the following:
1. Activating data in the ODS object
In the Implementation Guide in the BW Customizing, you can implement different settings under Business Information Warehouse -> General BW settings -> Settings for the ODS object that will improve performance when you activate data in the ODS object.
1. Creating SIDs
The creation of SIDs is time-consuming and may be avoided in the following cases:
a) You should not set the indicator for BEx Reporting if you are only using the ODS object as a data store.Otherwise, SIDs are created for all new characteristic values by setting this indicator.
b) If you are using line items (for example, document number, time stamp and so on) as characteristics in the ODS object, you should mark these as 'Attribute only' in the characteristics maintenance.
SIDs are created at the same time if parallel activation is activated (see above).They are then created using the same number of parallel processes as those set for the activation. However:if you specify a server group or a special server in the Customizing, these specifications only apply to activation and not the creation of SIDs.The creation of SIDs runs on the application server on which the batch job is also running.
1. DB partitioning on the table for active data (technical name:
The process of deleting data from the ODS object may be accelerated by partitioning on the database level.Select the characteristic after which you want deletion to occur as a partitioning criterion.For more details on partitioning database tables, see the database documentation (DBMS CD).Partitioning is supported with the following databases:Oracle, DB2/390, Informix.
1. Indexing
Selection criteria should be used for queries on ODS objects.The existing primary index is used if the key fields are specified.As a result, the characteristic that is accessed more frequently should be left justified.If the key fields are only partially specified in the selection criteria (recognizable in the SQL trace), the query runtime may be optimized by creating additional indexes.You can create these secondary indexes in the ODS object maintenance.
1. Loading unique data records
If you only load unique data records (that is, data records with a one-time key combination) into the ODS object, the load performance will improve if you set the 'Unique data record' indicator in the ODS object maintenance.
Hope this helps..
****Assign Points****
Thanks,
Gattu

Dual booting and sharing partition

Hi,
I am planning on installing Xubuntu and Arch on my laptop during the christmas break and have been reading around about how to best do this. I want to share the /home directory between these two installs to minimize duplicating files. I would like to know if there are any other folders that can be shared between two systems like Xubuntu and Arch.
Secondly, I would like to know if both Xubuntu and Arch can be installed on logical partitions within the same extended partitions.

This in only my opinion (there are many, many ways partitioning a dual-boot system), but I would personally not share /home (or any other system partition for that matter). Too much hassle (persmissions on your .dotfiles will be tricky), and not enough space savings to be worth the trouble.
Instead I would create a ‘extra’ partition and use that instead of /home for storing personal files/multimedia file in both OS’s. I would give it a label like ‘Multimedia’ or ‘Shared’ or ‘Data’ or whatever, and make this partition large enough to hold all my stuff.
Then just mount this shared partition to wherever you like in both OS’s, via /etc/fstab
Secondly)
Yes logical partitions are fine for installing (somebody correct me if I am wrong, but my understanding is that Linux does not care about being installed a on Primary or Logical partition). Just make sure you setup your bootloader properly.
Also the *biggest* advantage of using Logical partions is that you won’t really have a limit for the number of partitions you can create for each OS.

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

Similar Messages

Maybe you are looking for