Features Enabled By Disk Group Compatibility Attribute Settings

Table 4-3 describes the Oracle ASM features enabled by valid combinations of the disk group compatibility attribute settings.

Table 4-3 Oracle ASM features enabled by disk group compatibility attribute settings

Disk Group Features Enabled COMPATIBLE.ASM COMPATIBLE.RDBMS COMPATIBLE.ADVM

Support for larger AU sizes (32 or 64 MB)

>= 11.1

>= 11.1

n/a

Attributes are displayed in the V$ASM_ATTRIBUTE view

>= 11.1

n/a

n/a

Fast mirror resync

>= 11.1

>= 11.1

n/a

Variable size extents

>= 11.1

>= 11.1

n/a

Exadata storage

>= 11.1.0.7

>= 11.1.0.7

n/a

Intelligent Data Placement

>= 11.2

>= 11.2

n/a

OCR and voting files in a disk group

>= 11.2

n/a

n/a

Sector size set to nondefault value

>= 11.2

>= 11.2

n/a

Oracle ASM SPFILE in a disk group

>= 11.2

n/a

n/a

Oracle ASM File Access Control

>= 11.2

>= 11.2

n/a

ASM_POWER_LIMIT value up to 1024

>= 11.2.0.2

n/a

n/a

Content type of a disk group

>= 11.2.0.3

n/a

n/a

Replication status of a disk group

>= 12.1

n/a

n/a

Managing a shared password file in a disk group

>= 12.1

n/a

n/a

Greater than 2 TB Oracle ASM disks without Oracle Exadata storage

>= 12.1

>= 12.1

n/a

Table 4-4 describe the Oracle ACFS features enabled by valid combinations of the disk group compatibility attribute settings.

Table 4-4 Oracle ACFS features enabled by disk group compatibility attribute settings

Disk Group Features Enabled COMPATIBLE.ASM COMPATIBLE.RDBMS COMPATIBLE.ADVM

Volumes in disk groups

>= 11.2

n/a

>= 11.2

Encryption, replication, security, tagging (Linux systems)

>= 11.2.0.2

n/a

>= 11.2.0.2

Read-only snapshots

>= 11.2.0.2

n/a

>= 11.2.0.2

Encryption, replication, security, tagging (Windows systems)

>= 11.2.0.3

n/a

>= 11.2.0.3

Read-write snapshots

>= 11.2.0.3

n/a

>= 11.2.0.3

Unlimited file system expansion

>= 11.2.0.4

n/a

>= 11.2.0.4

Performance and scalability improvements in ls and find

>= 11.2.0.4

n/a

>= 11.2.0.4

Storing database data files and redo logs in Oracle ACFS file systems (on Windows the software must be 12.1.0.2 or higher and COMPATIBLE.ADVM must be set to 12.1.0.2)

>= 12.1

n/a

>= 12.1

Encryption, replication, security, tagging (Solaris systems)

>= 12.1

n/a

>= 12.1

Replication and tagging (AIX systems)

>= 12.1

n/a

>= 12.1

Creation from an existing snapshot and conversion of a snapshot

>= 12.1

n/a

>= 12.1

Support for 1023 snapshots

>= 12.1

n/a

>= 12.1.0.2

Accelerator volume for Oracle ACFS file system

>= 12.1

n/a

>= 12.1.0.2

The following list applies to Table 4-3 and Table 4-4.

  • If encryption is configured for the first time on Oracle ASM 11g Release 2 (11.2.0.3) on Linux or if encryption parameters must be changed or a new volume encryption key must be created following a software upgrade to Oracle ASM 11g Release 2 (11.2.0.3) on Linux, then the disk group compatibility attributes for ASM and ADVM must be set to 11.2.0.3 or higher.

  • All database files for Oracle Database can be stored in Oracle ACFS starting with Oracle Database 11g Release 2 (11.2.0.4), except for data files and redo logs in an Oracle Restart configuration. Using replication or encryption with database files on Oracle ACFS is not supported. For additional information, including any limitations or restrictions about storing data files in an Oracle ACFS file system, refer to "Overview of Oracle ACFS".

  • Oracle ASM and Oracle ACFS features not explicitly listed in Table 4-3 and Table 4-4 do not require advancing the disk group compatibility attribute settings.

  • Oracle ASM and Oracle ACFS features explicitly identified by an operating system in Table 4-3 and Table 4-4 are available on that operating system starting with the associated disk group attribute settings.

  • The value of COMPATIBLE.ASM must always be greater than or equal to the value of COMPATIBLE.RDBMS and COMPATIBLE.ADVM.

  • A value of not applicable (n/a) means that the setting of the attribute has no effect on the feature.

  • For information about the rebalancing process and the ASM_POWER_LIMIT initialization parameter, refer to "ASM_POWER_LIMIT".