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тАО11-09-2008 02:25 PM
тАО11-09-2008 02:25 PM
raw files storage to storage
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тАО11-09-2008 03:35 PM
тАО11-09-2008 03:35 PM
Re: raw files storage to storage
If this is a database, then there may be some database utilities you could use.
With so little information given about your environment it is hard to make any real recommendation.
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тАО11-10-2008 04:38 AM
тАО11-10-2008 04:38 AM
Re: raw files storage to storage
If you want to move the entire data from one raw disk to another raw disk use dd with bigger block size.
Ex:
dd if=/dev/rdsk/c0t5d0 of=/dev/rdsk/c0t6d0 bs=1024k
Ganesh.
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тАО11-10-2008 09:26 PM
тАО11-10-2008 09:26 PM
Re: raw files storage to storage
Thanks a lot Patrick & Ganeshan for your suggestions.
We're having oracle database files as raw devices, each database file has been configured as a logical volume.
Do I need to include the physical volumes or the logical volumes in the 'dd command'.
Thanks
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тАО11-10-2008 11:17 PM
тАО11-10-2008 11:17 PM
Re: raw files storage to storage
Create the same logical sized logical volumes in the destination and use dd to copy
Provide the the dd'ed source to dest list to the DBA's they will be able to use this to make the new DB working.
Regards
John
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тАО11-11-2008 02:16 AM
тАО11-11-2008 02:16 AM
Re: raw files storage to storage
Gotta go ahead with it after a small presentation.
Thanks
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тАО12-24-2008 05:23 AM
тАО12-24-2008 05:23 AM
Re: raw files storage to storage
today i found that i'm able to use "mv" command on a D-Class server to move raw devices from one volume group to another.
Is it possible for me to do the same for migrating raw devices accross storage boxes (ds2300 & EVA4400) and if at all it is how reliable is it.
Regards
Chunki
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тАО12-24-2008 07:23 PM
тАО12-24-2008 07:23 PM
Re: raw files storage to storage
Are you sure that you actually moved any data? mv is a renaming tool in the same filesystem. If you did soemthing like:
mv /dev/vg01/myraw /dev/vg02
then you did not move any data at all. Instead, you moved a device file to a different directory. Nothing changed. You can prove this by running a dd on that raw device -- you will see the same physical disks light up just as before because the device file refers to the hardware.
> Is it possible for me to do the same for migrating raw devices accross storage boxes (ds2300 & EVA4400) and if at all it is how reliable is it.
It will never work. The correct method is to use dd as mentioned before. The destination logical volumes must be the same size. You must use the bs option for any reasonable speed.
dd if=/dev/vg01/rmy_lvol of=/dev/vg02/rmy_lvol bs=512k
Without the bs= line, the transfer will ytake 20x-50x longer to complete.
Bill Hassell, sysadmin
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тАО12-29-2008 07:23 AM
тАО12-29-2008 07:23 AM
Re: raw files storage to storage
How does the oracle dba, backup/restore, the raw oracle database files ?
I hope, if they are really raw oracle database files, via oracle utilities.
Let the oracle dba, use the same oracle utilities, to move them across different storage.
Best Regards,
Chris