Oracle RAC ASM

This section describes how to install and configure CTE on an Oracle RAC ASM.

Using CTE with an Oracle RAC ASM

You can apply CTE when the Oracle DB is active or inactive. If you choose to use it while the Oracle DB is active, it eliminates any downtime. You can apply CTE during low volume traffic time frames. If you choose to use this option, then use the rebalance function of ASM. This allows you to:

1. Migrate data off of a disk so that it can be dropped/removed from a Diskgroup.

2. Apply CTE protection.

3. Add the disk back into the diskgroup.

Caution

If you drop a disk from an ASM diskgroup, then add it back to the diskgroup without cleanly wiping the disk, the ASM diskname will be corrupted. To avoid this problem, clear out the disk before you add it back to diskgroup. Example: dd if=/dev/zero of=/dev/secvm/dev/mapper/asmdg-asmlv002 bs=32k

• Important ASM Commands and Concepts

• Determining Best Method for Encrypting Disks

• General Prerequisites

• Specific Prerequisites