Correctly identifying the database disks and setting the appropriate ownership and permission on them are critical steps to take to ensure Oracle can properly take control of the disks. One of the most reliable methods to identify the correct disks to use is to query the disk ids or WWNs. In the Linux guest, the scsi_id command is commonly used to query the information. On the storage platform, depending on where the disks are created (either in VMware or in ABS), the information is extracted from either VMware or the CVM. The following subsections describe the procedures to query the disk information.