Which two statements are true about Automatic Storage Management (ASM)? (Choose two.)
A.
It mounts databases and diskgroups to make ASM files available to database instances.
B.
It spreads files proportionally across all disks in a diskgroup, aiming to ensure that all the disks in a
diskgroup have the same I/O load.
C.
It automatically places each disk from an external redundancy diskgroup in its own failure group.
D.
It divides files into extents and allows an extent to span disks.
E.
It mirrors data at the allocation unit (AU) level across failure groups within a normal or high redundancy
diskgroup.
Explanation:
https://docs.oracle.com/cd/E11882_01/server.112/e18951/asmcon.htm#OSTMG94058
B,E
B-Oracle ASM spreads the files proportionally across all of the disks in the disk group. This allocation pattern maintains every disk at the same capacity level and ensures that all of the disks in a disk group have the same I/O load. Because Oracle ASM load balances among all of the disks in a disk group, different Oracle ASM disks should not share the same physical drive.
E-The Oracle ASM normal and high redundancy disk groups enable two-way and three-way mirroring respectively.
not A-A disk group must be mounted by a local Oracle ASM instance before database instances can access the files in the disk group.
Not C-Disk groups with external redundancy do not use failure groups
https://docs.oracle.com/cd/E11882_01/server.112/e18951/asmcon.htm#OSTMG94059
Agree. It’s B and E.