About Oracle RAC ASM Raw Devices
Standard Devices
In many cases the ASM configuration may be using plain device names, like the following:
/dev/hdisk1
If you use standard device names in the ASM configuration to add a disk, you must modify the ASM_DISKSTRING parameter to include the /dev/secvm/dev/* path.
Consistent Naming of Devices across RAC Nodes
As previously stated, if the raw device mappings for the disk(s) are NOT identical across all nodes in the RAC, then you CANNOT use a Host Group and you MUST apply the GuardPoints to each Host individually. This is typically NOT optimal, as a Host Group is the most effective way to manage an Oracle RAC environment.
