Rebuild ASM Disk - Copying multiple datafiles from one disk to another

Hi,
I have an environment of four 11GR2 Oracle databases on a Linux server. Each database has its own ASM disk.
DB1 -> ASM_DISK1
DB2 -> ASM_DISK2
DB3 -> ASM_DISK3
DB4 -> ASM_DISK4
I need to rebuild one of the ASM disks (ASM_DISK1), but first I need to copy all of the datafiles to another disk (ASM_DISK2). I tried backing up the database using RMAN, but it was taking too long (nearly two days when I cancelled it). So now I am going to copy the files using ASMCMD CP command.
Basically my task is as follows:
1. Shutdown database.
2. Copy all data from ASM_DISK1 to ASM_DISK2.
3. Drop ASM_DISK1.
4. Re-create ASM_DISK1.
5. Copy all data back to ASM_DISK1.
6. Start database.
Database size is 700GB.
I am using the below script to copy the files.
Copy Script
================
asmcmd ls +ASM_DISK1/DB1/DATAFILE >> asm_list.txt
for FILENAME in `cat asm_list.txt`
do
asmcmd >> asm_LOG.log <<EOF
cp ASM_DISK1/DB1/DATAFILE/$FILENAME ASM_DISK2/DB1_BACKUP/DATAFILE/$FILENAME.dbf
EOF
done
================
I will then rename each file in the database like so:
alter database rename file '+ASM_DISK1/DB1/DATAFILE/filename' to '+ASM_DISK1/DB1/DATAFILE/filename.dbf'
My questions are as follows.
Is this approach a valid solution?
Will renaming the files during copy corrupt the files?
When I copy the files back to the original disk after rebuild, then rename them, will the database be able to start?
Rgs,
Rob

rgilligan_tnf wrote:
Hi,
I have an environment of four 11GR2 Oracle databases on a Linux server. Each database has its own ASM disk.
DB1 -> ASM_DISK1
DB2 -> ASM_DISK2
DB3 -> ASM_DISK3
DB4 -> ASM_DISK4
I need to rebuild one of the ASM disks (ASM_DISK1), but first I need to copy all of the datafiles to another disk (ASM_DISK2). I tried backing up the database using RMAN, but it was taking too long (nearly two days when I cancelled it). So now I am going to copy the files using ASMCMD CP command.
And how do you propose to update the controlfile to point to the new location?
unless your datafiles are offline and/or the database is down, you will corrupt them and have an unusable database when you finish.
how were you doing this with RMAN? Depending on the size of your database(700G), it very well could take some time. I have restored databases at a rate of >300G/hr from scratch. You will need to shutdown at some point to relocate the controlfiles and system and redo logfiles.
Just curious, what is the problem with diskgroup ASM_DISK1 that you want to rebuild it?
Basically my task is as follows:
1. Shutdown database.
2. Copy all data from ASM_DISK1 to ASM_DISK2.
3. Drop ASM_DISK1.
4. Re-create ASM_DISK1.
5. Copy all data back to ASM_DISK1.
6. Start database.
Database size is 700GB.
I am using the below script to copy the files.
Copy Script
================
asmcmd ls +ASM_DISK1/DB1/DATAFILE >> asm_list.txt
for FILENAME in `cat asm_list.txt`
do
asmcmd >> asm_LOG.log <<EOF
cp ASM_DISK1/DB1/DATAFILE/$FILENAME ASM_DISK2/DB1_BACKUP/DATAFILE/$FILENAME.dbf
EOF
done
================
I will then rename each file in the database like so:
alter database rename file '+ASM_DISK1/DB1/DATAFILE/filename' to '+ASM_DISK1/DB1/DATAFILE/filename.dbf'
My questions are as follows.
Is this approach a valid solution?
Will renaming the files during copy corrupt the files?
When I copy the files back to the original disk after rebuild, then rename them, will the database be able to start?
Rgs,
Rob

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