What is the prefix ORCL for ASM disks?

version: 11.2 / RHEL 5.8

Once the ASM disk is created using the oracleasm, you can add the ASM disk to the disk as a group
SQL> alter diskgroup DATA1 add disk 'ORCL:DISK2';

Diskgroup altered.
Is the prefix "ORCL:" mandatory? What is it, anyway?

He is discovered by ASMLib chain. Please read "Discovery ropes for Linux ASMLib" section http://www.oracle.com/technetwork/topics/linux/install-082632.html.

Tags: Database

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