Tuesday, October 20, 2015

ORA-15410: Disks in disk group DISKGROUP_NAME do not have equal size

If you are trying to create a diskgroup (suppose diskgroup name is DATA) and you see errors as bellow
ORA-15018: diskgroup cannot be created
ORA-15410: Disks in disk group DATA do not have equal size
following would be the reason of it.

Starting Grid Infrastructure, we need to have all disks with same size in a disk group, unlike previous versions where we could have varying sized disks in a diskgroup. So if we face ORA-15410 while creating a diskgroup, it would mean that disk size(s) is/are different in the diskgroup; which you are creating. Make sure that all disks being used in this disk group have same size and try again.

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