1. Database Reference
  2. Initialization Parameters
  3. Initialization Parameters
  4. ASM_PREFERRED_READ_FAILURE_GROUPS

1.21 ASM_PREFERRED_READ_FAILURE_GROUPS

ASM_PREFERRED_READ_FAILURE_GROUPS specifies the failure groups that contain preferred read disks. Preferred disks are instance specific.
Property Description

Parameter type

String

Syntax

ASM_PREFERRED_READ_FAILURE_GROUPS = ‘<diskgroup_name>.<failure_group_name>, ...’

Default value

NULL

Modifiable

ALTER SYSTEM

Modifiable in a PDB

No

Basic

No

Oracle RAC

The value is different on different nodes

Note:

The ASM_PREFERRED_READ_FAILURE_GROUPS initialization parameter is deprecated in Oracle Database 12c Release 2 (12.2.0.1) and may be desupported in a future release. It is replaced by the PREFERRED_READ.ENABLED disk group attribute.

See Oracle Automatic Storage Management Administrator's Guide for more information about the PREFERRED_READ.ENABLED disk group attribute.

To reset the parameter value to null, issue the following statement, which updates the server parameter file (SP file), then reboot Oracle ASM so that the change takes effect:

alter system reset asm_preferred_read_failure_groups;

See Also:

Oracle Automatic Storage Management Administrator's Guide for more information about this parameter