1. System Overview
  2. What's New in Oracle Exadata Database Machine
  3. New Features for Oracle Exadata System Software Release 11.x
  4. What's New in Oracle Exadata Database Machine 11g Release 2 (11.2.3.3.0)
  5. Oracle ASM Disk Group in Appliance Mode

10.2.6 Oracle ASM Disk Group in Appliance Mode

The Oracle ASM appliance.mode attribute improves disk rebalance completion time when dropping one or more Oracle ASM disks. This means that redundancy is restored faster after a failure. The attribute is automatically enabled when creating a new disk group. Existing disk groups must explicitly set the attribute using the ALTER DISKGROUP command.

The attribute can only be enabled on disk groups that meet the following requirements:

  • The Oracle ASM disk group attribute compatible.asm is set to release 11.2.0.4, or later.

  • The cell.smart_scan_capable attribute is set to TRUE.

  • All disks in the disk group are the same type of disk, such as all hard disks or extreme flash disks.

  • All disks in the disk group are the same size.

  • All failure groups in the disk group have an equal number of disks.

  • No disk in the disk group is offline.

Minimum software: Oracle Exadata System Software release 11.2.3.3 running Oracle Database 11g Release 2 (11.2) release 11.2.0.4 or Oracle Database 12c Release 1 (12.1) release 12.1.0.2

See Also:

Oracle Exadata System Software User's Guide for additional information about the appliance.mode attribute

Parent topic: What's New in Oracle Exadata Database Machine 11g Release 2 (11.2.3.3.0)