ASM Disk Group Creation During GI 19c Installation

Create and manage ASM disk groups

Answer Correct answer: B, E — The Installer permits the creation of a disk group for the Recovery Area for the ASM instance and for use by the voting disks and OCR file.

Which two statements are true regarding ASM when installing Oracle Grid Infrastructure 19c? (Choose two.)

If ASM disk groups are configured for the Clusterware files, then ASM must be used for all databases on the cluster.
The Installer permits the creation of a disk group to be used for the Recovery Area for the ASM instance. Correct Answer
If no ASM disk groups are specified during installation, then ASM instances are not started after the installation completes on any cluster node.
ASM disk groups used for voting files and OCR files require a quorum failgroup.
The Installer permits the creation of a disk group for use by the voting disks and OCR file. Correct Answer

Community Votes

67%

33%

67% of anonymous learners picked answer BE. Votes are pick records left by other test-takers — they are not the verified answer.

Community Insight

Tests knowledge of ASM capabilities during GI setup, specifically distinguishing between clusterware files and database recovery areas while avoiding the quorum failgroup trap.

Determines the correct statements about ASM disk group creation during Oracle Grid Infrastructure 19c installation, focusing on recovery area and voting file configurations. This page clarifies that the installer allows creating disk groups for both purposes.

Many users select D because they assume a 'quorum failgroup' is required for all voting disk groups, but this term is specific to Flex ASM/Redundancy levels and not a general installation requirement for standard disk groups.

Community Discussion (3 comments)

Tunglinfo9 👍 1 Selected: DE

D: "ASM disk groups used for voting files and OCR files require a quorum failgroup." This statement is correct. Disk groups that contain Oracle Clusterware files (OCR and voting files) have a higher minimum number of failure groups than other disk groups because the voting files are stored in quorum failure groups. A quorum failure group ensures that a quorum of the specified failure groups are available and is used to determine if the disk group can be mounted if there is a loss of one or more failure groups. E: The Installer permits the creation of a disk group for use by the voting disks and OCR file is true. The Oracle Universal Installer can be used to install Oracle Clusterware, which can put the Oracle Cluster Registry (OCR) and the voting files on Oracle Automatic Storage Management (Oracle ASM). The installer provides the option to automatically mirror OCR. Also, the Grid Infrastructure Management Repository can be created in its own disk group during installation of Oracle Grid Infrastructure.

217972f 👍 1 Selected: BE

B but NOT for ASM Instance. ASM Instance can't be in archivelog mode, so recovery area isn't needed. I think this answer is badly transcribed. A database can use ASM or shared storage independently C incorrect, ASM diskgroup can be created for the first time after ASM startup D quorum failgroup is required for voting diskgroup with normal or high redundancy

lcoleandro 👍 1 Selected: BE

A. Incorrect: Databases can use other storage options independently of ASM being used for Clusterware files. B. Correct: The Installer allows creating a disk group for the Recovery Area during installation. C. Incorrect: ASM instances can still be started without specifying ASM disk groups during installation. D. Incorrect: ASM requires redundancy but does not specifically require a "quorum failgroup." E. Correct: The Installer allows creating a disk group for voting disks and OCR files during installation.

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Expert Analysis

Why the Answer Is Correct

Option B is correct because the Grid Infrastructure installer provides options to create a new disk group specifically designated for the Fast Recovery Area (FRA) or archive logs during the initial setup phase. Option E is correct as the installer explicitly handles the creation of the disk group that will house the OCR and Voting Files, which are critical for Clusterware operation.

Why the Other Options Are Wrong

Option A is incorrect; using ASM for Clusterware files does not mandate its use for all databases, as non-ASM storage (like NFS or local filesystems) can still be used for individual databases. Option C is incorrect because an ASM instance can start and function without any disk groups being present at boot time; it simply won't have storage until one is created. Option D is incorrect because the term 'quorum failgroup' is associated with Flex ASM and specific redundancy configurations (like Normal/High Redundancy in Flex Mode), not a universal requirement for all voting disk groups created during standard GI installation.

Community Comment Notes

As Tunglinfo9 noted, the concept of quorum failgroups applies to specific redundancy scenarios rather than being a blanket requirement for all voting disk groups. User 217972f correctly pointed out that the statement about the Recovery Area might be poorly transcribed but remains valid in the context of what the installer permits creating. Another user lcoleandro confirmed that A, C, and D are incorrect based on standard ASM behavior and flexibility.

Official Reference

https://docs.oracle.com/en/database/oracle/oracle-database/19/cwadd/administering-oracle-clusterware-and-asm.html

Exam Strategy

When analyzing installation steps, focus on what the installer 'permits' doing versus what is strictly mandatory for operation. Distinguish between Clusterware-specific storage requirements and general database storage options.

Frequently Asked Questions

Why is option D considered incorrect?

The term 'quorum failgroup' is specific to Flex ASM and certain redundancy configurations. Standard voting disk groups do not universally require this specific terminology or configuration during basic installation.

Can ASM instances start without disk groups?

Yes, an ASM instance can start even if no disk groups are specified or available during installation. It will remain operational until a disk group is created and mounted.

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