Steps to Backup And Restore ASM Metadata
Set the environment to ASM using .oraenv
Issue asmcmd to start the ASM client
The md_backup command makes a copy of the metadata for one or more disk groups. The summary usage is shown below.
md_backup [-b location_of_backup] [-g dgname [-g dgname …]]
An example of the command is shown below. The resulting file contains all the metadata needed to recreate the ASM setup.
ASMCMD [+] > md_backup -b /tmp/backup.txt -g data
Disk group to be backed up: DATA
ASMCMD [+] >
The md_restore command allows a restore of a disk group from the metadata created by the md_backup command. It also allows a certain amount of manipulation of the final disk groups during the restore. The summary usage is shown below.
md_restore -b <backup_file> [-li]
[-t (full)|nodg|newdg] [-f <sql_script_file>]
A straight restore of the backup taken previously is shown below.
ASMCMD [+] > md_restore -b /tmp/backup.txt -t full -g data