Raw device support in 11gr2

We are currently running oracle 10.2.0.4 RAC using raw devices on the hpux itanium 64bit platform. We want to upgrade to 11.2.0.3 and I am wanting to know what parts of of database environment will still be able to utilize raw devices?
Can my datafiles remain on raw devices or will we need to somehow convert over to using ASM? What about the ocr and voting device? Can they remain on raw devices or do we need to configure ASM for the ocr and voting disk?
Thanks.

923395 wrote:
We are currently running oracle 10.2.0.4 RAC using raw devices on the hpux itanium 64bit platform. We want to upgrade to 11.2.0.3 and I am wanting to know what parts of of database environment will still be able to utilize raw devices?
Can my datafiles remain on raw devices or will we need to somehow convert over to using ASM? What about the ocr and voting device? Can they remain on raw devices or do we need to configure ASM for the ocr and voting disk?
Thanks.when all else fails, Read The Fine Manual
http://docs.oracle.com/cd/E11882_01/install.112/e24169/storage.htm#sthref558

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IS RAW DEVICES SUPPORTED OVER A CLUSTER FILE SYSTEM

Can raw partions be defined for datafiles after having choosen Cluster file system as storage option for database while creating fresh database using
DBCA?

> Do update on how the partitions have to be defined in either cases?
For both ASM and OCFS, a partition must exist on the disk - it can be of any partition type. Does not matter. Simply that the s/w references a partition and not an entire disk.
So for example, /dev/sdaf and dev/sdag are two shared devices on the cluster (LUNs on the SAN or whatever).
You create a partition on each. E.g
# fdisk -l /dev/sdaf
Disk /dev/sdaf: 36.5 GB, 36573020160 bytes
255 heads, 63 sectors/track, 4446 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdaf1 1 4446 35712463+ 83 LinuxTo use the first device as a OCFS device, you need to build an ocfs file system on it using mkfs.
And then it can be mounted as a "normal" cooked file system mount. Remember that /etc/fstab needs to be updated for mounting it on startup.
To use the second device for ASM, you have two choices. If you have the ASMlib kernel module installed, you can use that to configure a volume label and assign it for use by ASM.
Alternatively, you simply map the device (partition) to a raw device for detection by ASM. E.g.
# raw /dev/raw/raw1 /dev/sdag1Of course, you also need to make this permanent by updating the raw device list config file so that this mapping is performed on reboot. On Linux, this is the /etc/sysconfig/rawdevices file. Also remember that the user and group access for the logical raw device created, must allow ASM full access to it (e.g. use chmod oracle.dba /dev/raw/raw1).
In a nutshell, this is how to raw devices are used as ocfs and asm volumes. (on RHEL specifically, but I expect no major differences in this approach on other o/s's)

How to setup the raw devices permissions permanantly in 11gr2 on RHEL 5.

Hi All,
Succesfully installed 11gr2 RAC and working fine , but in next boot raw devices permissions revert back to root .
Please advice me to how to setup permissions permanantly as the oracle user.
Regards
San
.

you find the lib on this page:
http://www.oracle.com/technetwork/topics/linux/downloads/rhel5-084877.html
in the AMD64 / Intel em64t Architecture table
this is the direct link
http://oss.oracle.com/projects/oracleasm/dist/files/RPMS/rhel5/amd64/2.0.5/2.6.18-194.el5/oracleasm-2.6.18-194.el5xen-2.0.5-1.el5.x86_64.rpm
hth
p.s. don't forget to mark question as helpful/correct and close the question.

ASM support BLOCK raw device?

Does ASM support for BLOCK raw device? or only there is support for CHARACTER raw device?
Or it is specific to UNIX platforms?
Thanks.

790066 wrote:
Does ASM support for BLOCK raw device? or only there is support for CHARACTER raw device?As I understand, ASM needs to be able to open a device using the direct I/O call kernel interface. Old style block devices do not have that, thus the need for raw char devices (on top of a block device) to provide the required direct I/O interface.
But raw devices have been depreciated by the Linux kernel and Oracle also has support notes stating the same. The kernel now supports opening a block device with the O_DIRECT flag set.
Offhand though, I do not see a problem using a device in ASM as long as ASM has access to it (permissions okay, discovery string set) and the device can be successfully opened via the I/O calls made by ASM.
You need to select the most appropriate device interface (if a device has multiple) for ASM to use. I'll expect that ASM notes/installation details from Oracle for that specific o/s will have the details needed to make that decision.
Or it is specific to UNIX platforms?Do not use anything else but Linux for many years now, so cannot comment on how this works/looks like on Unix flavours like Solaris and HP-UX and others.

Raw devices for 11g rac

hi,
whether 11gr2 rac supports raw devices in ibm aix 6.1 with power ha?
regards
sridhar

Hi;
Pelase see:
Raw Devices and Cluster Filesystems With Real Application Clusters (RAC) [ID 183408.1]
For your future RAC related issue I suggest close your issue here as answered than move your issue Forum Home » High Availability » RAC, ASM & Clusterware Installation which is RAC dedicated forum site.
Regard
Helios

Computer doesn't recognize USB-Raw device

I have followed EXACTLY the same procedure for setting up a USB Raw device for VISA control as described on the NI support website. I am using VISA v3.2. But when I plug in my USB device, the driver that it associates to the device is the USB HID driver which is not what I want. I have been able to setup the same device on other identical computers (OS, VISA version, etc. was the same) without issue. I have tried multiple times going through the process after removing all USB HID drivers but have not had any success. Any ideas?

Hi ee_engineer,
Just to make sure we're on the same page, are you using the procedure detailed in the following link?
Knowledge Base 325APJ2Y: How Can I Communicate With a Device Using NI-VISA USB RAW Mode?
It sounds like you are experienced with this procedure, so I am not sure without more information the reason that the process is not working in this case. A few recommendations I have are to ensure that you are using the correct VID and PID in the Device Driver Development Wizard, and that it is being saved in the correct place (the Windows INF file). Once this is accomplished, the device should then be detected as a new hardware with NI-VISA as the driver. If you have any further specific questions regarding this, please post them and we will continue troubleshooting this.
John M
Applications Engineer

How to check space on asm and raw device?

Hi All,
I want to know how to check the space on asm device.
we are using asm device which is on raw partition.
Our archive gets full.I need to check the space on asm archve partiotion.
how can i check the archive destination space?
we are using raw device partition for crs and voting device.
how can we check the space on raw device and how can we know which device is in use and which are not in use
Thanks in advance

4 - 5 raw partitions...
What oracle version?
Install OCR + VOTE in raw device better than OCFS2. if you use 10g to 11gR1.
If use 11gR2,keep OCR + VOTE in ASM Disk Group.
you can check which raw device OCR:
$ ocrcheck
VOTEDISK:
$ crsctl query css votedisk
On 10g if use raw device for OCR + votedisk: recommend 1 file = 250M
11g recommend 1 file = 512M
Good Luck

How to add a disk to a VM in order to be seen as a raw device?

I am running Hyper-V in Windows 8.1 Pro with Oracle Linux installed in the VM. I am running in the Linux VM an Oracle database (for testing purposes). I want to add a SSD which is seen as a raw device by the VM. Is this possible? How?
As far as I understand in order to assign devices to a VM you need Vt-d, which must be supported by the CPU (i7-4771), motherboard (Intel DQ87PG) and by the hypervisor. Is this
correct? The CPU and the mobo both are supporting Vt-d last time I checked.
Thanks,
Codrut

you can add pass through disk to the virtual machine
http://blogs.technet.com/b/askcore/archive/2008/10/24/configuring-pass-through-disks-in-hyper-v.aspx
Darshana Jayathilake

Raw device mapping

accidentally we lost the rawdevice mapping file /etc/sysconfig/rawdevices. since we do not have OS backup we could not restore this file.
without this file ASM could not mount diskgroups....
Is it possible to find the device mapping from anykind of OS or Oracle Log/Trace files?
Oracle alert log contains only /dev/raw/raw1....

Hi,
If the raw devices are still bound to the block device and you haven't rebooted since you lost you rawdevices config file then you could identify the major/minor numbers using /usr/bin/raw -qa
The example below shows that dev/raw/raw1 is bound to /dev/sdb1
[root@foo]# raw -qa
/dev/raw/raw1: bound to major 8, minor 17
[root@rmukvm214 dev]# ls -l sdb1
brw-rw---- 1 root disk 8, 17 Jun 17 16:14 sdb1
I'm not sure if this is the most elegant or safest way of piecing this information back together, as mentioned you might want to raise an SR with Oracle support.
Regards

SAPINST : Error CJS-00091 with raw devices on AIX 5.2

Dear all,
I am trying to install a Web Application Server Java 6.40 SR1 on AIX/Oracle but get the following error due to the fact that I opted for a raw-device installation.
> CJS-00091 Unable to create the tablespaces.
> DIAGNOSIS: There is not enough free disk space:
>
> Mount point | space required | space available | SAPDATA directories
> /oracle/DEP | 2805 | 933.887 | 1,2,4
>
> SOLUTION: Make more disk space available.
You will probably tell me that an OSS note exists and that I should adapt the 'control.xml' within the installation directory but that's not the point. This problem was probably present in older releases but is now corrected with the Support Release 1 (SR1) of Netweaver '04
In fact, I don't understand why SAPINST still tries to work with the classical "SAPDATA" structure as it should now work with the "SAPRAW" directory only (See OSS Note 145654). This "SAPRAW" directory is only containing links refering to the raw devices SAPINST should use.
Here's what I've got :
> ls -la sapra*
>
> drwxr-xr-x 2 oradep dba 256 15 Feb 11:29 cntrl
> lrwxrwxrwx 1 oradep dba 18 15 Feb 11:28 depdb_1 -> /dev/rdepddb010013
> lrwxrwxrwx 1 oradep dba 18 15 Feb 11:28 depdb_2 -> /dev/rdepddb010014
> lrwxrwxrwx 1 oradep dba 18 15 Feb 11:28 depdb_3 -> /dev/rdepddb010015
> lrwxrwxrwx 1 oradep dba 18 15 Feb 11:28 roll_1 -> /dev/rdepddb010011
> lrwxrwxrwx 1 oradep dba 18 15 Feb 11:28 system_1 -> /dev/rdepddb010009
> lrwxrwxrwx 1 oradep dba 18 15 Feb 11:28 temp_1 -> /dev/rdepddb010010
> lrwxrwxrwx 1 oradep dba 18 15 Feb 11:28 undo_1 -> /dev/rdepddb010012
And here's the "SAPDATA" structure SAPINST wrongly created
> ls -la sapda*
>
> sapdata1:
> drwxr-xr-x 2 oradep dba 256 15 Feb 11:28 system_1
>
> sapdata2:
> drwxr-xr-x 2 oradep dba 256 15 Feb 11:28 roll_1
> drwxr-xr-x 2 oradep dba 256 15 Feb 11:28 temp_1
>
> sapdata4:
> drwxr-xr-x 2 oradep dba 256 15 Feb 11:28 depdb_1
Any idea, what the problem is?
I presume the installation script contains some bugs when working with raw devices but would like to know whether someone already experienced this...
Many thanks for your help,
Xavier Vermaut
SAP BC Administrator
Unisys Belgium

Hello Arun,
Maybe I am wrong but I think you did not understand what was the problem...
When using 'raw devices', SAPINST shouldn't use the classical SAPDATA directory structure but should only create links into the 'SAPRAW' directory.
So, SAPDATA directories should not exist! Only links (refering to the raw devices to be used) within the SAPRAW directory should be present!
In the meantime, I got this problem solved by SAP. They temporarily modified my 'keydb.xml' file to get this fixed but they should release an appropriate correction within a few days. This way of doing (I mean modifying the 'keydb.xml') is only applicable to my system...
Cheers,
Xavier

Mount raw devices from one plarform to another?

Hi,
I would like to know if it is possible to mount raw devices from one platform on Tru Filesystem to another platform on HP-UX running ASM? I am asking that to know if we can save precious time avoiding copying the datafiles from our Tru64 server to our HP-UX server. If this can be made, the "only" work we would have to do is transporting tablespaces via Transportable Tablespace.
Thanks for your attention.

When I do File>Import the only two options I've are "Files" and "Show iPhoto Browser".
Hello Pedro,
what is your Aperture version on the iMac? The File menu should look like this in the current version 3.2.2. Do you only see two items, or are some options greyed out?
unfortunately I had erased all the files from the pendrive
Why? Not much space on the pendrive? erasing images is no good idea, if you are searching for missing master image files - next time you have any kind of trouble with unconnected masters, keep all existing copies of your images, until you have reconnected the versions safely and are dead sure where the original masters are stored. If you accidentally moved the masters, you may be erasing the only copy you still have.
Thus said, what is on on your pendrive right now? Do you still have the exported library there? If so, you may try the following:
I think you may have a permissions problem or formatting problem with the pendrive.
Is pendrive formatted MacOS X extended? If not, then reformat it (with DiskUtility) to MacOS X extended, if you want to use to to transfer images between Aperture Libraries. Pendrives usually come preformatted for Windows users, and Aperture does not recognize all formats, i.e. MS Dos (FAT) is not supported by Aperture. Reformatting will erase the drive, however.
Set the permissions on the drive to "ignore ownership on that volume": Select the pen drive in the Finder and then press (command)⌘-I to open the Get Info panel. At the bottom of the panel you should see a checkbox "Ignore Ownership on this Volume" (if your drive is MacOS extended). Set this flag.
Also check the permissions of the Aperture Library on this drive - you shoud have read-write permissions, and the perpissions of any enlosing folder.
Regards
Léonie

Convert from raw devices to filesystems

Is there a document or technote that describes a best practice approach to converting a database from raw devices to filesystems?
Thanks!

Thank you for your posting - The Member Feedback forum is not monitored by Oracle support or product teams and so Oracle product and technology related questions cannot be answered. However we recommend that you post this thread to the "Database - General" forum.
The URL is: General Database Discussions
Also, please try using OTN's search function.
Thanks - The OTN team

Raw devices under Linux 2.4.x

Hi.
Does Oracle 8.1.7 support raw devices under linux 2.4.x? Is there some documentation? What advantages/disadvantages? Is it worth moving from ext2 to raw?

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Andrij Korud ([email protected]):
Hi.
Does Oracle 8.1.7 support raw devices under linux 2.4.x? Is there some documentation? What advantages/disadvantages? Is it worth moving from ext2 to raw?<HR></BLOCKQUOTE>
Oracle does fully support raw devices. For a mini cookbook, search on "raw device". I've put up a mini story on how to make raw redologs.

Raw device or NTFS

As far as I checked, under UNIX environment, using raw devices is recommended for LiveCache. How about windows environment ?

Hi,
a.) with 'SnapShot backup solution', do you mean the liveCache/MaxDB snapshot functionality? To my knowledge, this is not (yet) supported as a backup strategy.
More information on liveCache/MaxDB backups can be found in note FAQ: MaxDB Administration: <a href="https://websmp104.sap-ag.de/~form/handler?_APP=01100107900000000342&_EVENT=DISPL_TXT&_NNUM=846890&_NLANG=EN>">846890</a>
b.) on Windows systems, liveCache/MaxDB backups will work with the file system in an unbuffered way, so you don't need to take care of any file system caches.
Hope the above answer your questions.
Regards,
Roland
Message was edited by:
Roland Mallmann

Raw device to ASM

Hi,
How can i move the "RAW device" Migrating to ASM
what are the steps to be followed
Oracle Version : 11.1.0.7.0
Platform: AIX 6.1
Thanks,
Ramesh

Aman.... wrote:
ASMLIB is not mandatory to use the raw device with ASM. Its an "add-on" to improve the performance, that's all!Not really a performance improvement as it cannot make ASM I/O go any faster - it is a more a management driver that enables you to manage ASM disks/LUNs via an ASM command line interface. But as you said, it is not mandatory. I personally prefer using udev and multipath directly on Linux for configuring and maintaining device names and permissions for all disks and LUNs and not treat ASM ones differently via another interface.
Also, as ASMlib is a kernel module, it is another moving part at boot time. It needs to match the kernel version used. It and other similar kernel drives need to "+play nice+" with one another. And this is the primary reason we've stopped using ASMlib after we first tried it with 10.1 RAC. There were incompatibilities between it and a vendor kernel driver, resulting in adhoc ASM I/O errors. And the Metalink Note at the time stated that there are no incompatibilities between ASMlib and such vendors drivers... (and I did request Support to amend that note after the incompatibility was identified via a SR, but it never was).

Raw device support in 11gr2

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