What is the maximum number of ASM disk groups in one ASM installation?

What is the maximum number of ASM disk groups in one ASM installation?

What is the maximum number of ASM disk groups in one ASM installation?

A.
10

B.
63

C.
64

D.
511

E.
512

F.
Unlimited

Explanation:
ASM instances are smaller than database instances. A 64 MB SGA should be sufficient for all but the
largest ASM installations.

http://docs.oracle.com/cd/B19306_01/server.102/b14231/storeman.htm

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Answer is D

Increased ASM storage limits for 12c
The ASM storage hard limits on maximum ASM disk groups and disk size has been drastically increased. In 12cR1, ASM support 511 ASM disk groups against 63 ASM disk groups in 11gR2. Also, an ASM disk can be now 32PB size against 20PB in 11gR2.

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