| Property | Description |
|---|---|
| Parameter type | String |
| Syntax | ASM_PREFERRED_READ_FAILURE_GROUPS = <diskgroup_name>.<failure_group_name>, ... |
| Default value | NULL |
| Modifiable | ALTER SYSTEM |
| Basic | No |
| Real Application Clusters | The value is different on different nodes |
ASM_PREFERRED_READ_FAILURE_GROUPS specifies the failure groups that contain preferred read disks. Preferred disks are instance specific. This parameter is only valid in ASM instances.