Storage Management (ASM ACFS DNFS ODM) (MOSC)

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RAC 19.11.0: How to create NORMAL redundancy diskgroup in a Extended RAC?

in Storage Management (ASM ACFS DNFS ODM) (MOSC) 4 commentsAnswered ✓

Hi colleagues,

My configuration is:

RAC Extended 19.11.0 on RHEL 8.2

5 nodes: 2 in site1, 2 in site2, 1 in site3 just for quorum disk purposes


The Oracle 19c Official documentation says about normal redundancy failgroups:

Administrator's Guide

https://docs.oracle.com/en/database/oracle/oracle-database/19/ostmg/mirroring-diskgroup-redundancy.html#GUID-9AAB5AE7-D819-4CDA-9552-4B41C3383C73

"...Oracle recommends a minimum of three failure groups for normal redundancy disk groups... to maintain the necessary number of copies of the Partner Status Table (PST) and to ensure robustness with respect to storage hardware failures..."

"If configuring an extra failure group presents a problem with storage capacity management, then a quorum failure group can be used as the extra failure group to store a copy of the PST. A quorum failure group does not require the same capacity as the other failure groups"

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