To ensure data availability during patches and protection against single-node server failure, the ASM redundancy level should be 'High'. High redundancy (triple mirroring) ensures that there are three copies of the data, providing additional protection against multiple simultaneous failures. This means that even if one server is being patched and another server fails, the data will still be available and intact. High redundancy is the appropriate choice to meet the customer's requirements.
Customers can access the ILOM interface through the ILOM CLI interface via the management network, the ILOM Web interface via the management network, and by initiating a remote KVM session to the ILOM. These methods allow for comprehensive hardware management capabilities for both the Exadata database and storage server hardware components.