Failure group

Dec 29, 2018 3:19PM

Hi,

I read this:

Oracle ASM Failure Groups

Failure groups are used to store mirror copies of data.

Does it mean that in a Disk group we have the main disk containing data and the failure groups to store mirror copies?

For example when we run:

CREATE DISKGROUP disk_group_1 NORMAL REDUNDANCY

FAILGROUP failure_group_1 DISK

'/devices/diska1' NAME diska1,

'/devices/diska2' NAME diska2

FAILGROUP failure_group_2 DISK

'/devices/diskb1' NAME diskb1,

'/devices/diskb2' NAME diskb2;

A disk for data other than