QUESTION 118 You are managing an Oracle Database 11g instance with ASM storage. You lost an ASM disk

QUESTION 118

You are managing an Oracle Database 11g instance with ASM storage. You lost an ASM disk group

DATA. You have RMAN backup of data as well as ASM metadata backup. You want to re-create the

missing disk group by using the ASMCMD md_restore command. Which of these methods would you use

to achieve this?

(Choose all that apply.)

A. Restore the disk group with the exact configuration as the backed-up disk group, using the same disk

group name, same set of disks, failure group configurations, and data on the disk group.

B. Restore the disk group with the exact configuration as the backed-up disk group, using the same disk

group name, same set of disks, and failure group configurations.

C. Restore the disk group with changed disk group specification, failure group specification, disk group

name, and other disk attributes.

D. Restore metadata in an existing disk group by passing the existing disk group name as an input

parameter

Correct Answer: BCD

Section: (none)

Explanation

Explanation/Reference:

ASMCMD> help md_restore

md_restore

This command restores a disk group metadata backup.

md_restore backup_file [--silent][--full|--nodg|--newdg -o 'old_diskgroup:new_diskgroup [,...]']

[-S sql_script_file] [-G 'diskgroup [,diskgroup...]']

The options for the md_restore command are described below.

backup_file - Reads the metadata information from

backup_file.

--silent - Ignore errors. Normally, if md_restore

encounters an error, it will stop.

Specifying this flag ignores any errors.

--full - Specifies to create a disk group and restore

metadata.

--nodg - Specifies to restore metadata only.

--newdg -o old_diskgroup:new_diskgroup - Specifies to create a disk

group with a different name when restoring metadata.

The -o option is required

with --newdg.

-S sql_script_file - Write SQL commands to the specified SQL

script file instead of executing the commands.

-G diskgroup - Select the disk groups to be restored.

If no disk groups are defined, then all

disk groups will be restored.

The first example restores the disk group DATA from the backup script and creates a copy.

The second example takes an existing disk group DATA and restores its metadata.

The third example restores disk group DATA completely but the new disk group that is created

is called DATA2.

The fourth example restores from the backup file after applying the overrides defined in the override.

sql script file

ASMCMD [+] > md_restore --full -G data --silent /tmp/dgbackup20090714 ASMCMD

[+] > md_restore --nodg -G data --silent /tmp/dgbackup20090714 ASMCMD [+] >

md_restore --newdg -o 'data:data2' --silent /tmp/dgbackup20090714 ASMCMD [+] >

md_restore -S override.sql --silent /tmp/dgbackup20090714