Can sys admins backup Raw devices?
Platform: Solaris 5.10
DB versions : 11g
Since raw devices are not OS formatted can sys admins backup raw devices ? If they can't , then, that means we have to rely entirely on RMAN backups for our RAC DBs. Right?
resistanceIsFruitful wrote:
Platform: Solaris 5.10
DB versions : 11g
Since raw devices are not OS formatted can sys admins backup raw devices ? Yes. They can use the dd (disk dump) command to backup - where if (input file) is the raw device and of (output file) is a tape drive or backup device.
If they can't , then, that means we have to rely entirely on RMAN backups for our RAC DBs. Right?That should be the preference. As backup of a raw device using dd does not guarantee a database or cluster that can be restored - as other processes are/can be writing data to it, while dd is reading from it to backup. It does not have the same management and control features, and flexibility, of rman.
Not using rman would be a mistake IMO.
Similar Messages
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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 -
Database Data files on RAW Devices
Hi,
I'm creating a database and wish to locate the tablespaces on a raw device.
How do I specify the datafiles for the tablespaces on the raw device.> Any reason for moving to raw device?
I actually prefer raw devices and ASM over using cooked file systems.
By default RAW devices eliminate the "interference" of the kernel. It does not manage a file system on the device. There are no other foreign processes that can use that raw device (as is often the case with cooked devices). There is no o/s file system cache for that device. A physical I/O on the Oracle side means a dinkum physical I/O and not a maybe-logical-I/O-from-the-file-system-o/s-cache.
There is no need for me as DBA to manage that file system according to OFA standards (ASM does it for me). There is no need for me to go through the learning curve of using a 3rd party volume manager. I have features like automated load balancing while the instance is up and running.
Yes, there is an argument to be made for just how much of a performance improvement in I/O one can get from a raw device versus a cooked file system. But I/O performance is not the only consideration. -
Hi,
I already created raw devices on database 10g R2. How can make those raw devices available to oracle user?
Best Regards
Yassin
Message was edited by:
YassinYes, the os is Sun Solaris and my question how can
create tablespaces on raw devices.create tablespace abcd datafile '/dev/rdsk/c0t0d0s4/abcd.dbf' size ...
This is an example only, adapt it to your needs! Never fill up the rawdevice completely, leave some space for emergency situations. A different question: why are you using raw devices? What's the output of uname -a? Beginning with Solaris 8 (don't know the maintenance level), you can mount filesystems with the direct io option which gives you almost raw device performance with all advantages of a file system.
Thank you.
Yassin
Message was edited by:
Yassin -
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,
RameshAman.... 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). -
How can we find the raw device size from OS level?
Thanks Chandra!!
Still I can't see the size of the file.
lsattr -E -l rrawspace68
lsattr: 0514-519 The following device was not found in the customized
device configuration database:
rrawspace68
When I do the following
lsattr -E -l rawspace68 => output is as followed
copies 2 Number of physical partitions e
inter x Policy for allocation over mule
intra m Policy for allocation on physie
label None Information label e
lvserial_id 000c8c900000d60000000120a0521407.68 Volume group identifier . minoe
relocatable y Bad block relocatable policy e
size 40 Number of logical partitions ie
strictness y Copies allocation policy e
stripe_size Stripe Size e
stripe_width 0 Striping Width e
type raw Type description e
upperbound 128 Number of physical volumes to e
How can we figure-it-out the size of the device?
Thanks
Srini -
Create the raw devices under Linux
Hi,
Hoe can I create the raw devices under Linux?Hi,
I just have created two raw devices,
1, /etc/sysconfig/rawdevices
/dev/raw/raw1 /dev/hda2
/dev/raw/raw2 /dev/hda3
2, chown oracle:dba /dev/raw/rawN and chmod 660 /dev/raw/rawN
3, after restart the machine, start I runInstaller again.
But Oracle can still not find the candidate disks, even after give the path /dev/raw
Why? -
Cold backup of controlfile raw device
We have Oracle 9.2.0.4 on AIX 5L on node 1 and node3 with controlfile as raw device. These two nodes are connected through LAN. I shutdown the database DB on node1 and take the backp of controlfile in /ora/backup on node1 usind dd command. I mput this file in binary mode on node3 over ftp. On node3 when I tried to mount the database using this controlfile it gave error
"ora-0201- controlfile version incompatible with oracle version."
In alert log it showed the message
Corrupt block relative dba: 0x00000001 (file 0, block 1)
Fractured block found during control file header read
Data in bad block -
type: 0 format: 0 rdba: 0x00000000
last change scn: 0x0000.00000000 seq: 0x0 flg: 0x00
consistency value in tail: 0x00000000
check value in block header: 0x0, block checksum disabled
spare1: 0x0, spare2: 0x0, spare3: 0x0
What can be the exact problem?? Any hlep.Why are you mounting or doing this ? I think databases on node1 and node3 are not the same. Controlfile of a database cannot be used to mount a different database.
fyi,
ORA-00201 controlfile version string incompatible with ORACLE version string
Cause: The control file was created by incompatible software.
Action: Either restart with a compatible software release or use CREATE CONTROLFILE to create a new control file that is compatible with this release. -
Raw Device Backup to file system(OPS 8i)
Hi
Our currently setup is
Oracle database 8.1.6 (Oracle Parallel Server) Two Node
Noarchive Mode
Solaris 2.6
all database file ,redo logfiles,controlfiles under raw device.
database size 16 G.B
oracle block size 8192
currently we are using only export backup of oracle.
But now i want to take cold backup of oracle database to disk.
cold backup Raw --> Disk
How we can take cold backup with dd command and skip parameter ?
Is anybody have practical idea of dd command with skip parameter.
Thanks and regards
Kuljeet pal singhyou can use ufsdump instead of dd
-
I would like to backup our Oracle9i db(raw device) with rman.
Is such a thing possible?Yes, you can use RMAN to take the backup of database sitting on raw devices And you can use OSB to take the backup on tape.
Daljit Singh -
How can i use raw device in oracle 9.2.0.4
can i use "create tablespace XXX datafile '/dev/raw1' ..." to use raw device for tablespace? Or i should use "ln -s /dev/raw1 /oradata/xxx.dbf"?
does raw device as same as "xxx.dbf" is limited 4GB ?
pool english.hi,
as far as windows NT OS is concerned,,there's a utility (OCOPY) to store ur datafiles on to raw devices,,,but u cant directly access that datafiles for runtime databases,,its just for backup purposes..
umar -
almost tried everything....reinstalling ....32 bit 64 bit.. itunes. msconfig. antivirus disabling.... full antiviurs scan, installing on different computers.. using a different network....netshell command and what not.....dns flush....everything static dns...what and what not ....still problem is persisting ...can anyone help please....internet is working absolutely fine...checked everything else everything is good...but itunes cant even backup my device (((( feeling sorry for myself..
The first step should be to run your network connectivity tests.
iTunes help>>run diagnostics, just check network connectivity tests.
Paste the entire result into your next post. You can remove serial numbers. -
How can I copy datafile (from one Raw device) to another Raw device ???
can anybody tell me how do i copy/move one datafile from one raw device to another raw device.... ?
I am having AIX 5.3 with SAN.
Pls. help me...
regards,
Star NiravHello Hans,
Currently I am using via RMAN... Want to know which one help me....? Is there any size limitation via dd command ? Can I use iocopy instead of dd in AIX ?
man dd -
Hello Apple Community,
Can I backup two devices (with different documents) to one iCloud account?
For example: iPad Air and iPhone 5, not everything is synced between the two, but I would like to backup each (seperately in the cloud). Is this possible?
This way when I change from an old ipad to a new, I can restore with the ipad backup, and when I change from an old iphone to a new, I can restore from the
iphone backup.
Thank you in advance!Terminology check here. Do you really mean a "CD"? There's a difference in Cloud behavior between content from a physical CD you ripped (which only has Cloud content if you have iTunes Match) and an "album" you bought from the iTunes Store.
Read references for Home Sharing.
iTunes: How to share music and video - http://support.apple.com/kb/HT2688 - about Music Sharing and Home Sharing
Home Sharing Support page - http://www.apple.com/support/homesharing/
iOS: Setting up Home Sharing on your device - http://support.apple.com/kb/ht4557 - "With Home Sharing in iOS 4.3 or later, you can stream your entire iTunes library over your home Wi-Fi network from your Mac or PC right to your iPhone, iPad, or iPod touch."
The above can get pretty complicated. You are probably best off by syncing both devices to a single library and/or updating the libraries on both computers to have the same content. -
Can I back up my iPhone 4S to my ipad 3 (64 gb)? I do not have a computer running Mountain Lion. Our desktop still runs Tiger, so I purchased the 3rd generation iPad with 64 gb thinking it had had plenty of room to backup my iPhone photos. I used a camera connection kit and transferred about 1100 old photos from my camera roll on my iPhone to my ipad. I then deleted pictures from my iPhone and now my camera roll has only 357 photos. However, in the Settings, under "About" it says I have 2147 photos. Why? I only have a total of 216 photos in all my albums. However, now I don't have enough space in iCloud to backup either device. Why not? Any help, any advice, appreciated please! I spent a long time on the phone with Apple today and they couldn't solve the problem.
rabidrabbit wrote:
Can I back up my iPhone 4S to my ipad 3 (64 gb)?
no
rabidrabbit wrote:
However, now I don't have enough space in iCloud to backup either device. Why not?
iCloud only give so much space for free storage, then if you exceed the limit of 5gb you have to pay for additional storage.
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