Examine the command to back up the ASM metadata:
ASMCMD>md_backup /backup/ASM_backup
In which three situations can you use the backup?
A.
when one or more disks in an ASM disk group are lost
B.
when the data file on an ASM disk group gets corrupted
C.
when one of the disks in a disk group is accidentally unplugged
D.
when one or more file directory paths are accidentally deleted from an ASM disk group
E.
when all the ASM disk groups for the ASM instance are lost
A,D,E
I think its BDE
Hi,
Does anyone know which is more accurate answer for this question. BDE sounds good although not sure about E.
ADE
http://www.hhutzler.de/blog/asm-backup-and-restore-dg-metadata/
The md_backup command creates a backup file containing metadata for one or more disk groups. i
By default all the mounted disk groups are included in the backup file which is saved in the current working directory.
http://docs.oracle.com/cd/E11882_01/server.112/e18951/asm_util004.htm#OSTMG94578
The md_backup command creates a backup file containing metadata for one or more disk groups.
Answer is ADE . It cant be B because md_backup backups the metadata about the diskgroups. If the datafile is corrupted then you will need to restore the actual backup taken by RMAN to recover it.
Why not C everyone?
Thanks!
A.
http://docs.oracle.com/cd/E11882_01/server.112/e18951/asm_util004.htm#OSTMG94578
The md_backup command creates a backup file containing metadata for one or more disk groups.
ADE
https://docs.oracle.com/cd/E11882_01/server.112/e18951/asm_util004.htm#OSTMG94584
https://docs.oracle.com/cd/E16338_01/server.112/b61035/asm_util004.htm#BJEGIGDD
AE -correct
md_backup makes a copy of asm metadata. So A and E should be correct (if “lost” means droping , not wiping out from disk)
B -incorrect, because it means phisicall corruption.
posibbly C is incorrect – because UNPLUGGING means deataching ,so database cannot write to disk, and it loses data integrity.
Thus md_backup cannot help in such situation.
D- can anyone confirm than md_backup contains directory paths?
ADE
not sure about D
ADE